the age-earnings profiles by levels of education in Venezuela. the chart shows how income vary over the life cycle for people with various levels of education.note that those with higher levels of education start full-time work at a later age,but as the graph shows,their incomes quickly outpace those who started working earlier.but such future income gains from education must be compared with the total costs incurred to understand the value of human capital as an investment. education costs include any direct tuition other expenditures specifically related to education,such as books and required school uniforms,and indirect costs,primarily income forgone because the student could not work while in school.