We consider a cointegrating regression in which the integrated regressors are messy in the sense that they contain data that may be mismeasured, missing, observed at mixed frequencies, or have other irregularities that cause the econometrician to observe them with mildly nonstationary noise....

Standard target zone exchange rate models are based on nonlinear functions of an unobserved economic fundamental, which is assumed to be bounded, similarly to the target zone exchange rates themselves. A violation of this key assumption is a basic structural reason for model failure. Using a...

In early 2010, the U.S. Department of Health and Human Services released the findings from a large, experimental evaluation of the Head Start program. A common interpretation of the findings is that they show "small" effects, which has lead to, among other things, calls to improve the efficacy...