Our strategy for automatic selection in potentially non-linear processes is: test for non-linearity in the unrestricted linear formulation; if that test rejects, specify a general model using polynomials, to be simplified to a minimal congruent representation; finally select by encompassing...

We model expenditure on food in the USA, using an extended time series.  Even when a theory is essentially 'correct', it can manifest serious mis-specification if just fitted to data, ignoring its observed characteristics and major external events such as wars, recessions and policy changes. ...

Culture constrains individual choice by making certain behaviour taboo.  We propose an evolutionary model in which members of different groups attempt to coordinate over time.  We show that cultural constraints can lead to a permanent break down in coordination between groups, even when...

The first issue we study is the impact of transport costs on the volume and nature of international trade.  To what extent has the rise in international trade been driven by changes in transport costs?  Why is cross-country and cross-regional experience so different?  Transport costs also...

We develop a new automatically-computable test for super exogeneity, using a variant of general-to-specific modeling.  Based on the recent developments of impulse saturation applied to marginal models under the null that no impulses matter, we select the significant impulses for testing in the...

This chapter describes the issues confronting any realistic context for economic forecasting, which is inevitably based on unknowingly mis-specified models, usually estimated from mis-measured data, facing intermittent and often unanticipated location shifts.  We focus on mitigating the...

This paper presents new models for aggregate UK data on mortgage possessions (foreclosures) and mortgage arrears (payment delinquencies).  The innovations include the treatment of difficuly to observe variations in loan quality and shifts in forbearance policy by lenders, by common latent...

We model the interplay between a government's performance, its expected lifetime, and the confidence it enjoys. Here, "confidence" can be broadly interpreted as the government's popularity, the size of its parliamentary majority, its reserve of talent, or other factors. Confidence evolves in...

The idea of the 'L-shaped aggregate supply curve', supposedly a feature of primitive macroeconomic models, is in fact a reasonable reconstruction of a well developed way of thinking that specifically denied a relation between wage change and aggregate employment.  Neither that approach nor the...

This paper explores the role of culture in determining divorce decisions by examining differences in divorce rates by country of origin of immigrants in the United States.  Because immigrants who arrived in the US at a young age are all exposed to a common set of American laws and institutions,...