Ideas and Theories of Development Progress comes from the proper implementation of good ideas or theories. The highly developed countries encourage their peoples to produce fruitful ideas - and they are well-paid for such ideas. Unfortunately, in our own country, good ideas are ignored by the government. Hence, Filipino scientists offer their inventions to foreigners who are willing to pay them well. Foreigners develop said inventions into commercial purposes. During the ancient times, economic ideas were based on the Holy Scriptures and code of laws. Justice, mercy and charity were further propagated by the Church scholars during the medieval times. However, with the growth of trade, the accumulation of wealth has become important. To the mercantilists, wealth came from favorable foreign trade. To the Physiocrats who believed in the rule of nature, wealth emanated from the land. On the other hand, Adam Smith, the leader of the classical economists, claimed that real wealth could be created through industrial production. However, there were those who disagreed with the classical economic ideas, like Friedrich List, a German professor of economics. He said that the progress of a nation is great not in proportion to the accumulation of wealth, but in proportion to the development of productive resources such as natural resources, science, arts, government laws, education, peace and order, morality, and the harmonious relationship of the various industries and occupations. A leading theory in economic development is the innovation theory. The author, Joseph Schumpeter, has stressed the role of the innovator as the key to economic development. The innovator is the leader or entrepreneur who has the vision and courage to handle old system and be able to transform theory into practice. Some Economic Growth Models Economic models show the relationship of inputs and outputs. These are expressed in the form of graphs, tables, mathematics or words. Economic models can be simple or sophisticated. Most of these models are formulated by the Western countries, especially the United States. However, their effective applications depend on local conditions like climate, natural resources, manpower, culture, attitudes, and values. Unfortunately, there has been a tendency among the less developed countries to copy such foreign economic models in the hope of accelerating their economic development. More often than not they have bitterly experienced failures. Western economic models are only effective in their highly developed regions because these are suitable to their particular needs and conditions which are completely different from those in the less developed countries. Here are some of the more popular growth models: Ricardian model. The key factor is land. This means agriculture is the first priority in the attainment of economic growth. This model appears to be appropriate to poor countries who depend mostly on the land for their livelihood. The author of said model is David Ricardo, a prominent classical economist Harrod-Domar model. This was developed by Sir Harrod of England and Professor Domar of America. The key factor is physical capital like machines, buildings, equipment, and so forth. Based on this model, the input is capital, and its efficiency is determined by the number of output it can produce Kaldor model. According to Nicholas Kaldor, the author of the model, the key factor is technology which is embodied in physical capital. Japan is the best example which has achieved phenomenal economic growth through technology. Until now, it emphasizes research and technology in its economic programs.