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Which of those statements does not correspond to the concept of poverty trap:
a. At very low income levels, a vicious circle may set in, whereby low income leads to low investments (in health, education, etc.) which in turns leads to low productivity and economic stagnation.
b. For people in the poverty trap zone, income in the future is lower than income today.
c. For people outside the poverty trap zone, income in the future is higher than income today.
d. Poverty trap is an index measuring national socioeconomic development, based on combining measures of education, health, and adjusted real income per capita.
Answer: d. [this is the definition of Human Development Index]