Even though pieces of empirical evidence individually may corroborate an economic theory, their joint existence may refute that same theory. Testing of rational expectations models provides a concrete illustration of this principle. Surprisingly, empirical refutation of a rational expectations...

This paper discusses the econometric methodology of general-to-specific modeling, in which the modeler simplifies an initially general model that adequately characterizes the empirical evidence within his or her theoretical framework. Central aspects of this approach include the theory of...

Using annual data from Friedman and Schwartz (1982), Hendry and Ericsson (1991a) developed an empirical model of the demand for broad money in the United Kingdom over 1878-1975. We update that model over 1976-1993, accounting for changed data definitions and clarifying the concept of constancy....