More Than Good Intentions: How a New Economics is Helping to Solve Global Poverty Dean Karlan & Jacob Appel Dutton Press, New York: 2011 WEBPAGE: StickK Make students pledge to do something this quarter (turn in assignments, attendance, etc) In U.S., individuals give more than $200 billion annually to charity More than all foundations and corporations combined 2.3 Trillion spent by developed world in past 50 years Is it being spent well? Which is it? Need to invest more in poverty alleviation: Jeffrey Sachs Too many billions being flushed down the toilet: Easterly New behavioral economic approach Need to take human irrationality into account Can improve well being of poor Chapter 1: Introduction: The Monks and the Fish Discuss the difference between traditional and behavioral economic approaches through the example of “Econs” and “Humans”. Give specific examples of how understanding behavioral economics is helping design better development projects (i.e. identifiable victim, separating good and bad of giving, etc.) Good intentions: LA monks purchase fish from fisherman and release them Is there a better way? -pay fisherman to stay home would save fish trauma, gas, time, bait -but would it work? No joy in releasing the fish, fishermen might fish anyways would need to evaluate if a better way exists Traditional economics vs. behavioral economics Traditional economics “Econs” term used by Thaler to represent economic humans who are rational decision makers and use cost/benefit analysis to maximize their satisfaction Behavioral economics “Humans” term used by Thaler to represent imperfect people who do not always use cost/benefit analysis to make decisions -things unrelated to money are important -can be distracted, impulsive, and inconsistent 2 Pronged Attack to poverty alleviation 1. Understand problems Systemic problems: way the population interacts, exchanges info., trades Individual problems: insights from behavioral economics Humans can be distracted, impulsive, and inconsistent 2. Rigorous evaluation Compare competing solutions -does it solve the problem? -is the world better off because of it? Types of insights from behavioral economics that helps increase giving 1. Identifiable victim “Singer’s lake” Peter Singer, utilitarian philosopher at Princeton Walking down the street, you pass a lake with a drowning child. If you stop, you will miss an important meeting that will cost you $200. Do you have an ethical obligation to help? -most say yes What about sending $200 that will help a dying child survive? Do you have an ethical obligation to help? -most say no Singer’s utilitarian reasoning You should give all you have until you couldn’t spare $200 Typical objections 1. don’t know if $ will save life better evaluation can help with this 2. “identifiable victim” We like to see who we are helping: this is a “Human” response Save the Children: give letters from kids Kiva: show who is getting loan (this is actually deceptive) Understanding this is helping increase giving 2. Separating the good part of giving from the bad Good part: warm fuzzies Bad part: parting with $ Bundle with bigger bill Giving $1 at checkout Feel good now, pay later Text HAITI to give $10 now. Shows up on phone bill next month Giving small amounts Giving pennies, change Chapter 2: To Work Against Poverty Why does Karlan argue that there are “many paths forward” for poverty alleviation? Define and discuss how Randomized Controlled Trials (RCT) might be a helpful tool for the “many paths forward.” Development work is like bloodletting. We used to think leaches would cure everything but they didn’t. We need rigorous research to find out what works Randomized Controlled Trials (RCTs) -how people’s lives change with the program compared to how they would’ve changed without it Most impact studies are “Before/after” studies that only examine the first part of Definition -utilization of treatment and control group -random selection of who is assigned to control or treatment group (flipping a coin) Better than comparing groups with and without program… biased “Many paths forward” out of poverty Because of the heterogeneity of the poor Each individual needs different things Hard to design one-size-fits-all program Need to think what works best for each type of need Chapter 3: To Buy: Doubling the Number of Families with a Safety Net What is the “last mile problem”? What kind of insights have we gained from RCT in marketing of development projects? Include a discussion of “choice overload”. Importance of marketing for development Dev. Solutions aren’t adopted on their merits alone The poor must choose to participate (or purchase insurance, microloans,etc.) Marketing is lagging behind of our knowledge! i.e. OU’s Chagas disease…. We know what to do but how do we change ehavior? “The last mile” problem Sendhil Mullainathan, MIT economist We employ great minds and resources to solve problem and complete 999 miles out of 1000 journey put solution out there but don’t follow through i.e. oral rehydration therapy: plastic envelope of salts that allow body to retain water. Highly effective against diarrhea and only pennies but 2 m children die from diarrhea each year bad marketing, lack of adoption Marketing RCT: South African financial institution 53,000 on mailing list Presented dozens of different flyers Changed interest rates, photos (of pretty women), # of example loans All were significant Adding photo of pretty woman has same impact as lowering i 40%! “choice overload” Too many examples of different loans and breaking down their Payments drove off customers This is against standard economic theory: more choices/info better More insight from India Greater take up of rainfall insurance when farmers visited personally Even more when sales person introduced by trusted MFI agent Idea: students compare solicitation of participation in a project (or even just raising $) using different marketing approaches (test for choice overload) Chapter 4: To Borrow: Why the Taxi Driver Didn’t Take a Loan What have recent studies found about the impact on microfinance? Why don’t more poor people use microfinance when it’s offered? Microfinance vs. moneylending -explicit social mission -emphasis on entrepreneurship and microbusiness -group lending and/or group meetings -women’s empowerment Grameen Bank: Yunus 2006 Nobel prize 2011 6 million clients 16 decisions: link credit to behavioral changes -schooling -smaller families -sanitary latrines in homes -growing vegetables at home Impact of microfinance Bono: “Give a man a fish, he’ll eat for a day. Give a woman microcredit, she, her husband, her children, and her extended family will eat for a lifetime.” RCT South Africa study (Karlan) 50% of applicants in financial institutions routinely regjected All applicants with “maybe” creditworthiness would randomly get offered credit -could study effects of making loans to marginal clients -compare whether or not ones with loans were better off on year later Results: Those with credit -more likely to have kept jobs -higher income -Increased family prosperity -less hungry -loans more likely to deal with unexpected shocks (illness, broken vehicles) RCT Sri Lanka study (De Mel, McKenzi, Woodruff) 408 microentrepreneurs ½ got grant of either $100 or $200 ½ got nothing Results: Those with credit -increased monthly profit by 6% of grant amount -70% annual return… great! But people don’t take loans! Taxi driver excited about loan, says he wants one, but never bothers to apply 2007 Banerjee, et. al study on community effects in Hyderabad, India RCT 100 communities ½ selected to receive branch Fewer than 1/5 eligible borrowers took loan Most borrowed to pay off debt No community effects SO WHY DON’T THE POOR TAKE LOANS? 1. Av. Returns are high but suppose some get high returns, others get 0 or (-) Risk aversion Some people with lower returns Sri Lanka study Men did better than womenn Rich got better payoff Better results from cutting costs and shrinking rather than growing 2. Excessive restrictions on the use of borrowed $ People self select out if too many conditions Sri Lankan study $ given with no-strings was used 58% business, 42% consumption Other ideas (not in book) What about depression? Inability to make decisions What about choice overload? Better terms and conditions, convenience with moneylenders Marketing Chapter 5: To Pursue Happiness: Having Better Things to Do How can concepts like opportunity cost of time and daily targeting help us understand why taxi drivers might not maximize their profits? What are some unintended consequences of restrictive rules in development projects (such as requiring certain behavior or loan use) and how can list randomization shed light on real behavior? Ghanaian cab drive 2 hours late Opportunity cost of time is low in LDCs: no problem waiting NY cabs: Thaler On busy rainy days, cabs earn more but work shorter hours Why? Daily targeting theory -go home once hit target -stay trolling for fares longer on sunny days Economist showed that they could increase income by reallocating hours Question: Is this the result of a short time horizon (high discount rate?) Why don’t people excel in their businesses? 1. Training RCT found practical, concrete lessons with personalized approach Increased income, repayment and were cost effective 2. Being entrepreneur isn’t the main goal in their life Opportunity cost of their time Pursue happiness in other ways The problem with restrictive rules that go against what people want (i.e. loan use) Forces people to lie Might make people self-select out of program Fungibility of $ Hard to see where aid actually goes $ may actually help out in List randomization approach Technique for allowing people to admit to behavior anonymously Found in Peru that people spend lots on consumption with microcredit In Indonesia, about 50% on consumption Example: Are people stealing Milky Way bars from corner store? Hand one list (randomly chosen) to each customer and ask “How many (not which ones) of the following statements are true?” List 1 List 2 1. I visit the corner store at least 1. I visit the corner store at least once a week. once a week. 2. Milky Way is my favorite 2. Milky Way is my favorite candy bar. candy bar. 3. I eat at least one candy bar 3. I eat at least one candy bar per week. per week. 4. I have stolen a candy bar from the store. Statements 1-3 should have the same average agreement. To get theft answer, subtract the average agreement of 1-3 from all of list 2. Good for sexual behavior, theft, breaking rules Chapter 6: To Cooperate in Groups: What About the Weakness of the Crowd? What are the advantages and disadvantages of group lending with joint liability? How did Grameen II overcome some disadvantages associated with group lending? What are some interesting lessons gleaned from RCTs that have examined cooperation in groups? Group lending with joint liability Advantages: 1. information on client identity, creditworthiness 2. collateral substitute 3. monitoring, peer pressure 4. members help one another repay 5. saves MFI $ - spreads screening and monitoring costs to group 6. empowerment from being part of group Disadvantages 1. penalizes good clients who are forces to screen, monitor, and repay for bad 2. client time and transaction costs 3. might encourage over-indebtedness for smaller borrowers who get larger loans that their group members want 4. domino effect Solution: hybrid: individual loans with group mechanism Grameen II used this with great success 2004 RCT Giné and Karlan in Philippines Group vs. ind. Clients preferred ind. & invited more friends to join But pushed more costs onto loan officers (longer meetings) No difference in repayment Building cooperation and trust through groups RCT using the Trust game Player 2 decides how much $ to give to dictator $ is doubled Dictator decides how much $ to give Player 2 FINCA Peru Karlan gives everyone in room 3 soles ($1) Everyone forms pairs (sometimes with people in your credit group, sometimes With other groups) B’s leave the room Play trust game Do more trusting people pay back FINCA better? Yes! Group meeting frequency affects altruism and risk sharing RCT in India (Field and Pande) 1 year after initial loan, clients got altruism experiment Groups of 10 clients Some have weekly meetings Some have biweekly or monthly meetings Client approached and given lottery ticket. Told that 10 other tickets were Given to other groups Chance of winning 1/11 Prize: some offered 200 rupee gift card (for only one person) Others offered 4 50 rupee gift cards Given option of getting up to 9 more lottery tickets to give to their group members making odds now 1/20 Results: more tickets were handed in groups with weekly meetings More tickets were handed out when 50 rupee cards were prize -risk sharing Weekly meetings also had lower default rates Impact: MF design might actually have impact through real social transformation allowing for greater risk sharing and cooperation Chapter 7: To Save: The Unfun Option Why is savings both good and hard for poor people? Explain how commitment savings programs use insights from behavioral economics to help people overcome their nosavings inertia. Who does it seem to help the most? Saving is good Informal lenders take most of profit Prepares for shocks, income smoothing, precautionary, life cycle needs, business Savings is hard 1. it is not fun… give up immediate benefits. Boring. We are impatient (high discount rate) 2. easy to procrastinate future is “hazy” repeated procrastination leads to “inertia” not saving is a “matter of momentum” this is documented in psych and behavioral econ. lit. procrastinate healthy eating, quitting smoking, exercise 3. barriers and “beasties” fees and requirements family demands (beasties) husband drinks 4. people lack self control temptations 5. People are time inconsistent Impatient now but patient later Will start exercising, putting more away for retirement next month Would you prefer to get $5 now or $6 in a month? Would you prefer $5 in one month or $6 in two months? If answer differently: time inconsistent plan on saving in the future but don’t save now Can access to savings accounts make people better off? RCT Kenya Dupas & Roninson, 2006 Entrepreneurs keep daily logs of income, expenditures, and health ½ offered no frills savings account (0% interest with withdrawal fees) ½ nothing Results: 89% opened account Especially women and ROSCA members Logs showed S used for business, food, coping with illness Commitment savings plans Tying Odysseus to the Mast: Evidence from a Commitment Savings Product in the Philippines.” Sirens were three dangerous bird-women, portrayed as seductresses who lured nearby sailors with their enchanting music and voices to shipwreck on the rocky coast of their island. Odysseus (Homer’s Odyssey) was curious as to what the Sirens sounded like, so, on Circe's advice, he had all his sailors plug their ears with beeswax and tie him to the mast. He ordered his men to leave him tied tightly to the mast, no matter how much he would beg. When he heard their beautiful song, he ordered the sailors to untie him but they bound him the tighter. The ship made it through. StickK.com Behavioral economic webpage Punishment if fail Send $ to friend, charity or “anti-charity” (something you hate) 1. Making saving easier: SEED “Save Earn Enjoy Deposit” Philippines Cannot withdrawal $ until goal is reached the program allowed participants to add to their savings account but not withdraw from it until they had reached a self-defined goal. Many chose goals associated with a major event—a birthday, religious celebration, or graduation. When a participant enrolled, they could opt to deposit savings in an account at the bank or to make the deposits at home into a locked money box. Most chose the box, similar to a piggy bank, instead of handing over the money. The key to the box was held by the bank so the participant could put $ in, but not take it out. Sunny tried savings $200 for home improvement but every time S got to $50, she used it for something else Impact: SEED worked well for time inconsistent clients 50% more likely to sign up Helped women For those that signed up, there was a 4 fold increase in savings balances After 12 months 2. Christmas clubs Can’t withdrawal until goal or date Other savings insights Text reminders worked at increasing savings by 6% in the Philippines and Bolivia 2006 Saez examined incentives to IRA contributions Found that people gave more if it was matched rather than given as a rebate Should be the same but people act “irrationally” Could use for charitable giving, savings Chapter 8: To Farm: Something from Nothing Explain why Kenyan farmers have difficulties reaching specialized export markets and finding the correct seed and fertilizer mix. What are some behavioral economic insights that have promise in helping farmers move out of their “inertia”? Farming challenges 1. environmental hazards a. droughts b. floods c. bugs d. disease 2. technological gap a. equipment b. cultivation practices 3. structural deficiencies a. limited access to profitable markets b. limited info. about prices c. transportation costs d. storage limitations 4. price fluctuations DrumNet case study: The Kitchen Sink Approach Integrated suite of services Attempt to nudge them to adopt new cultivation techniques or new crops Central Kenya NGO PRIDE AFRICA (US MF and ag. NGO in E. Africa) Set up to recover cost Offered: -training in farming practices -information (Europeans love baby corn and French beans) -training in European standards -liaising with exporters -help opening S account -in kind loans of inputs -soil, water, sunlight analysis to see which crops work Obstacles to diversifying to specialized export market 1. info: no access to current prices 2. trust: farmers thought exporters would rip them off with low prices for inferior goods exporters feared farmers wouldn’t produce enough or would refuse to sell at agreed P 3. credit constraints need to pay for grading, certification, inputs 4. transportation to market RCT evaluation ½ invited to join drumNet Results: -farmers who joined were 50% more likely to grow export crops -farmers who were already exporting weren’t as likely to change to beans And baby corn -subsistence farmers or local cash crop farmers were more likely to switch -switching hhs increased income by 1/3 Failure of DrumNet 2005 new food safety standards: EurepGAP certification Each Kenyan farmer now needed: -grading shed -chemical storage facility with flush toilets and cement floors -mechanized sprayers -protective suits -detailed records -professional water and soil analysis Cost: $581 impossible Exporters refused to buy w/o certification Harvest rotted The O-Ring theory Challenger plastic o-ring threw off great effort Examples: 1. new European regulation 2. coupon for fertilizer resulted in greater fertilizer use 3. cell phone introduction Kerala, India fisherman example Fishermen bring catch to local market Sometimes shortage, surplus Wild price fluctuations 1997-2000 cell phones introduced Allowed farmers to call ports to see which one had best prices Immediate stabilization of prices Why don’t farmers put on fertilizer to increase yield? Kenyan Ministry of Agriculture had ideal hybid seed and fertilizer combo for every location based on test farms but less than 25% of farmers had used ANY fertilizer and fewer hybrid seeds Why? Variations in soil, rainfall, sun? Ignorance of plan? Refusal of plan? Behavioral inertia? 2000 RCT in Kenya Findings: -gov. suggested mix had highest yield but led to net loss due to cost -found right mix Some adopted Others did not Why don’t people adopt optimal input mix? “non-fully-rational” behavior 1. INERTIA (professors stick with same retirement portfolio and never change it) 2. Choice overload (when offered samples of too many jam varieties in store, we choose nothing but when offered 2 or 3, we are likely to buy) 3. Use anecdotes from friends and family instead of full cost/benefit analysis Do what neighbors do (or learn from failings) give farmers a behavioral nudge: Savings and Fertilizer Initiative coupon program created by Duflo, Kremer and Robinson -visit farmer after harvest to give chance to buy fertilizer coupon for following season why? At harvest, ag. is on mind & have $ people buy earthquake insurance right after earthquake even though odds of it happening again haven’t changed -pay up front -fertilizer delivered for free RESULT: 50% increase in fertilizer use for farmers offered coupons It was just a test and not continued The following year, farmers reverted to their old ways Chapter 9: To Learn: The Importance of Showing Up Discuss one example of the following efforts designed to increase school attendance: i.) conditional cash transfer, ii.) providing school uniforms, and iii.) deworming programs. Contrast the lessons and cost effectiveness of each approach. MDGs 2000 #1. hunger & poverty #2. universal primary education These are goals that everyone agrees on Story: Antony from small village in Ghana Family invested all $ in him for secondary school, sibs taken out Couldn’t afford college entrance exam fee Didn’t really understand what college was Ended up being a teacher but didn’t get paid for first 4 months Cost of ed (even if free) 1. opportunity cost 2. uniforms, supplies, lunch, transportation 3. fees, PTA, exam fees School uniform program RCT: Do supplying uniforms & supplies make a difference? Kenya, ICS Africa, study by Kremer 12 primary schools Randomly selected kids got uniforms and school supplies (all kids missing one Or more parents also got) Results: -sponsored kids came to school more Before 18% absenteeism After 11% for participants -attendance increased the most for those who previously had no uniform Were embarrassed to go to school Didn’t change for kids who already had uniform -cost $100/ year/student Conditional Cash Transfer program Oportunidades Must attend 85% of time to get paid 1997 originally Progresa Largest and most ambitious CCT ever attempted RCT: 2/3 communities get Progresa, 1/3 not Results -less likely to drop out -impact especially in secondary school where dropouts were highest -cost $1000/year/student Subsidios Colombia: tweaking the methodology 1. 1/3 of $ paid when students re-enroll Helps with school expenses 2. bonus for graduation collect bonus early if matriculates in terciary school wait for one year if not Results good -subtle improvements like timing of rewards don’t cost more but have big impact Deworming Program Hookworm, roundworm, whipworm, schistosomiasis Very contagious through feces Bad infection: abdominal pain, amnesia, malnutrition Mild infection: lethary, lack of focus, people get use to these conditions Kenya RCT by Kremer & Miguel Give pill that kills 99% of worms to kids in school if parents sign waiver Cost $0.20 per pill (one time only) Results: -80% of parents signed waiver -worm infections cut in half -not only for treated group, but fewer worms in others since it wasn’t being spread -attendance increased a lot… absences fell by 25% -in 2009, 20 m students in 26 countries participated in this program -cost $3.50 /year/student Teacher absenteeism Some teachers don’t get paid for months India: unscheduled visits to rural schools 50% teachers not teaching 25% absent 2005 survey -65% kids grades 2-5 couldn’t read simple paragraph -50% couldn’t do basic arithmetic Problem: monitoring is time consuming and costly RCT: Duflo and Hanna in India Give tamper-proof camera and ask for photo of class & teacher at the beginning And end of each day Old pay: $23/month New pay: $11.50 for 10 or fewer days in classroom $1.15 for each day over ten Results: -teacher absences went from 42% to 21% -better performance on tests Other studies: RCT Kenya found tracking helpful RCT India found reading camps in villages helpful Chapter 10: To Stay Healthy: From Broken Legs to Parasites Why aren’t doctors and patients showing up at clinics in poor countries and how can we improve on that record by incorporating behavioral incentives? LDC health care -lots of time waiting -doctor absenteeism -herbalists and shaman Doctor incentive program Seva Mandir NGO in India RCT Banerjee, Duflo, Glennerster Offered incentive scheme to ½ of 100 clinics -full pay if worked at least half days -fined penalty for each day worked if of worked less than half -fired if less than ½ days present for 2 months -had to punch in 3x day Results: 1. at first attendance increase 60% attendance in treatment clinics 30-45% in control 2. over time, effects wore off After 1 year, only 35% attendance (unannounced visits) in treatment What happened? -“broken” stamp machines -signed in by hand -superviors could excuse an absence (1/6 absences were excused) -Monitoring system must be corruption-proof Progresa CCT for health Poor families earn $ by making use of public clinics -free preventative care, immunizations, educational programs, pre-natal -amount is equivalent to 25% of monthly income RCT Gertler, huge sample Results: -97% of treatment families signed up for program -99% of enrolled got paid -no evidence of systemic fraud -after 2 years, kids in program showed 23% decrease in illness 18% decrease in anemia 1-4% increase in height 70% of cash went to increase quantity and quality of hh food Health benefits to all age brackets Changing relative prices of good and bad behavior StickK.com: make your own incentives CARES Philippines – Green Bank “Committed Action to Reduce and End Smoking” Make initial deposit of $1 and are visited weekly for 6 months to collect additional deposits (voluntary) At end of 6 months, one time urine test for nicotine If yes: $ goes to orphanage If no: get $ back RCT: 640 offered CARES 12% accepted (75 smokers) 600 in control group Results: Treatment 45% more likely to pass nicotine test Control: only 8% passed Only 1/3 of CARES members recovered savings After one year, people who were offered CARE (whether they took it or Not) did better Malaria Negative externality: you infect mosquitos and they spread it more Using bed nets not only protects you but lowers incidence of mosquito carriers Free mosquito net programs Recommended by Sachs Easterly warns: wasteful 70% of recipient didn’t use Should people spend something on nets? -filters out those who don’t want -provides sense of investment Sunk cost effect -Bought tickets to show, night comes & you don’t want to go but feel obligated -feel like you should finish lobster dinner Econs- ignore sunk cost Humans – feel obligated RCT Kenya: free or purchased mosquito net? Pregnant women offered nets at different prices (up to 60 cents) Results: -Bought fewer nets when expensive (law of demand) -no change in malaria levels regardless of price -about ½ used them at any price -will reach the most people if just give away Diarrhea in Kenya RCT Kremer, Gates Foundation Try to get people to use chlorine in water (WaterGuard product) Price incentives -free: increased use by 70% -coupons: increased use by 5-10% Social learning -ind. training -village training: performed better but short term effect Insider promotion -outside expert -local promoter: big effect! Free stand with Waterguard at well or water source -timing important: thinking about water when getting it -best effect! Chapter 11: To Mate: The Naked Truth Access to complete information helps us make decisions. This chapter explores condom use for avoiding pregnancy and HIV. Explain how access to information helped change girls’ behavior in Kenya, but did not affect behavior in Malawi. Why do you think that might be true? “Humans” forget to use protection In heat of moment, no cost/benefit analysis of probability of getting disease or unwanted pregnancy Hookers are not in throws of passion 1000 Mexico City sex workers 2001 Paul Gertler 9/10 used condoms Charged 23% extra to go w/o If man asks for condom, charge 8% more If man asks for no condom, 43% more INFORMATION ASYMMETRIES Sex in LDCs Limited information S. Africa Minister of Health 1999-1008 Dr. Manto Tshabalala Msimang (woman) ARV drugs are toxic: should use garlic, beetroot & lemon Kenya: trade-offs for having sugar daddy for young girls (14) Older and will take care of financially Much more likely to have HIV Do girls knowingly make choice between older and younger man or would they Change behavior with more info? RCT: 328 schools 2004 Dupas 71 randomly selected for Relative Risk Info. Campaign Explained risks of unprotected sex, gave HIV incidence by age groups Film and talk Also half schools were participating in G “no sex” teacher training Results Dupas program worked best: cut pregnancies by 1/3 Still had sex (actually a bit more) but with younger men and condoms Gov. program: no effect Do we act differently if we know we have HIV? No 2004 Malawi, Rebecca Thorton RCT Saliva swab at house then offered vouch to come find results at clinic and offered To purchase condoms once found out results Results: -people who were offered $ to get tested came more: anything >0 worked equally -knowing didn’t change behavior Chapter 12: To Give: The Takeaway What are the seven ideas that work? Is there any theme that you notice in the list? Did you like this book? Caution in giving $ 1. no correlation between low administrative cost & aid effectiveness some are just more expensive to run rewarding low overhead may reward those w creative accounting! 2. sometimes we need experimentation 3. proven aid can help people give intelligently Seven ideas that work 1. microsavings 2. reminders to save 3. prepaid fertilizer sales 4. deworming 5. remedial education in small groups: reading camps 6. chlorine dispensers for clean water 7. commitment devices