In this study I bring together two different literatures: the hierarchical education literature and the skill-biased growth literature. In an overlapping-generations model I introduce capital–skill complementarity into a hierarchical education system. I obtain results that differ qualitatively from previous studies, among which are the following: (i) At earlier stages of development, basically educated labor contributes to growth more than highly educated labor. The opposite occurs at later stages. (ii) Even when all individuals acquire higher education, a growth-enhancing policy subsidizes higher education. (iii) In a growth-enhancing policy, the share of public resources allocated to basic education declines as the economy grows. (iv) The enrollment rate evolves in an S-shaped pattern, as occurred in several OECD countries.

This paper analytically solves a life-cycle model that compares traditional and Roth retirement accounts. It includes realistic features such as tax deductibility of contributions and taxation of withdrawals, tax bracket structure with deductions, taxation of Social Security benefits, and tax risk at retirement. With current taxes, choosing a traditional account over a Roth creates small welfare losses in only a few cases, largely for those with higher incomes and pensions who are subject to the taxation of Social Security benefits. We also investigate tax variability and find that diversified strategies offer only small risk reduction benefits in our illustrations.

In the United States wealth is highly concentrated and very unequally distributed: the richest 1% hold one third of the total wealth in the economy. Understanding the determinants of wealth inequality is a challenge for many economic models. We summarize some key facts about the wealth distribution and what economic models have been able to explain so far.