A popular identification strategy in non-experimental panel data uses instrumental variables constructed by interacting exogenous but potentially spurious time series or spatial variables with endogenous exposure variables to generate identifying variation through assumptions like those of...

Public transfer programs that allow beneficiaries to choose the transferred good may be more efficient, but the poorest beneficiaries may not participate if the good chosen is too costly. A model shows that program targeting and consumption impacts are tied to selected quality of the provided...

This paper examines some of the characteristics and aims of the process of medical diagnosis and the problems posed by the seeming opposition between disease-centered and person-centered diagnosis. The latter was one of the basic tenets of the psychosomatic approach from its inception. Its...

The long-recognized spurious regressions problem can lead to mistaken inference in panel instrumental variables (IV) estimation. Spurious correlations arising from correlated cycles in finite time horizons can make irrelevant instruments appear strong with signable consequences for estimated IV...