This paper employs conditional second moments to identify the impact of education in wage regressions where education is treated as endogenous. This approach avoids the use of instrumental variables in a setting where instruments are frequently not available. We employ this methodology to...

A modern statistical literature argues that countries such as Denmark are particularly happy while nations like East Germany are not. Are such claims credible? The paper explores this by building on two ideas. The first is that psychological well-being and high blood-pressure are thought by...

Whether siblings of specific birth order perform differently has been a longstanding open empirical question. We use the family tree structure of the PSID to examine two claims found in the literature: whether being early in the birth order implies a distinct educational advantage, and whether...