Economic changes outweigh family planning in boosting Tanzania's income growth.
Population growth and economic factors were analyzed in the Rungwe District of Tanzania from 1948-1967. The study found that improving the economic structure had a bigger positive impact on income than family planning programs. Income increased by 10% per year from 1948-1957 but decreased by 2% per year from 1957-1967 due to lower coffee prices and poor water control. A model showed that under certain economic conditions, income would have increased by 53-63% between 1957-1967 with actual population growth. However, with low population growth and actual economic conditions, income would have only increased by 13%.