80 Impact evaluation of upgrading
cassava value chains through postharvest engineering and processing
research-for-development in subSaharan Africa
J. Rusike, T. Abdoulaye, V. Manyong
OP 3.2.2: Impact evaluations of value
chain-related interventions in RTB: cassava
processing
• Conduct PIPA workshops, key informant interviews,
and focus group discussion; review literature
• Carry out surveys of fabricator, processors and farm
households and Rapid Appraisal Value Chain Analysis
• Map gender roles & relations; identify gender
inequalities & gender-based constraints; innovations to
resolve gender-based constraints
• Data entry, cleaning and analysis
• Write up and reporting
• Dissemination
OP 3.2.4: Local capacity building for
impact assessment of cassava value
chain-related interventions
• Conduct workshops, seminars, training
courses
• Carry out stakeholder workshops and policy
dialogue fora meetings
• Conduct postgraduate student training
OC 3.2.1: Methods and guidelines
from CRP2 used to improve value
chain-related interventions
• Impact evaluation
– Evidence of impact of development and dissemination
of point intervention to processing: Nigeria’s Cassava
Agricultural Transformation Agenda; DRC’s
Presidential Initiative; Tanzania’s MUVI projects
– Best practice methods for increasing impacts: nucleus
farm-outgrower schemes; planting materials supply
– Policies for scaling up through private sector change
agents (e.g. nucleus farmers, processors, replicable
contracts)
OC 3.2.1: Methods and guidelines
from CRP2 used to improve value
chain-related interventions
• Local capacity building
– Design for impact evaluation using RCTs:
COMPRO, Africa RISING
– Local, national, regional Cassava Innovation
Platforms
– Students theses
OC 3.2.1: Methods and guidelines
from CRP2 used to improve value
chain-related interventions
Impact
• Increased productivity, quality and safety of the
products, profitability, employment, occupational
safety and incomes for cassava machinery and
equipment fabricators, processors and
households
• lower food prices for urban consumers and net
food buying farm households
• Capacity built improvement in business
environment -> lower transaction costs
• Capacity built impact: increment in knowledge
that generates new machinery/process designs
Linkages with other CRPs
• Roots, Tubers and Bananas CRP
– Priority Setting: local level studies: refine the
estimates of impacts of research options.
– Flagship: Raising incomes and improving the
health and safety at small and medium cassava
production centers, especially for rural women
• Humidtropics SRT3:
– Models for scaling strategies of intensification
interventions -> focus on scalable change agents
Tool’s progress: value chain
Consumption
Consumers
Poultry
farmers
Consumers
Ethanol,
starch,
sweeteners
Exports
Processing
Trade
Processing
Farm
Production
Inputs
Channel 1
Subsistence production
& consumption
Channel 2
Fresh marketed roots
nearby/long distance
Channel 3
Dried roots/chips for
direct human
consumption
Channel 4
Animal feed
manufacturing
Channel 5
Human food
manufacturing
Channel 6
Industrial
uses
Channel 7
Chips for exports
Tool’s progress: Value chain model of cassava industry
development: globalization
Tool’s progress: Value chain model of cassava industry
development: Globalization
-5
0
5
Tool’s progress: Value chain model of cassava industry
development: Globalization
1990m1
1995m1
2000m1
2005m1
months
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2010m1
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2015m1
Next steps
• Implement surveys and build data bases
• Validate tool: apply time series error correction
model to test hypotheses of liberalization and
globalization and integration and Box Jenkins
transfer function methods to test hypotheses of
causality of planting materials/cassava processing
on supply response
• Identify issues, best practices and policies
• Publish communicate results