This paper explores Rosenstein-Rodan's idea that simultaneous industrialization of many
sectors of the economy can be profitable for them all even when no sector can break even …

A simple supply and demand framework is used to analyze changes in the US wage structure
from 1963 to 1987. Rapid secular growth in the demand for more-educated workers, “more…

When world trade is costly, a country can profitably industrialize only if its domestic markets
are large enough. In such a country, for increasing returns technologies to break even, sales …

The existence of subsets of CD4 + helper T lymphocytes that differ in their cytokine secretion
patterns and effector functions provides a framework for understanding the heterogeneity of …

After encountering antigen, helper T (T H ) cells undergo differentiation to effector cells,
which can secrete high levels of interferon-γ, interleukin-4 (IL-4), IL-10 and other …

Our analysis of growth assumes endogenous fertility and a rising rate of return on human
capital as the stock of human capital increases. When human capital is abundant, rates of …

Using data from the March Current Population Survey, we document an increase over the
past 30 years in wage inequality for males. Between 1963 and 1989, real average weekly …

This paper considers specialization and the division of labor. A more extensive division of
labor raises productivity because returns to the time spent on tasks are usually greater to …

The naive CD4 T cell is a multipotential precursor with defined antigen recognition specificity
but substantial plasticity for development down distinct effector or regulatory lineages, …

We present a theory of a partial economic reform of a planned economy, similar to the one
that took place in Russia since 1988 and in China earlier. In such a reform, some markets are …