This paper examines two issues of relevance to the general phenomenon of residential segregation in large U.S. cities. The first issue studied is the availability of mortgage credit to prospective home buyers. A national sample of mortgage loan applications and their disposition is studied in...

This paper explores several alternative models of the exchange rate which highlight the role of real and monetary factors and the short- and long-run effects of exchange rate changes on real output. The first model focusses on purchasing power parity with flexible prices and a variable real...

In this paper, we use a unique data set containing detailed information on all full-time teachers at Canadian universities over the period 1970 through 2001. The individual level data are collected by Statistics Canada from all universities in Canada and are used to analyze the evolution of...

This paper examines the conceptual issues involved in measuring duration of completed spells of unemployment from Gross Flows. We find that such measures can avoid the "interruption" bias of Labour Force stock data, but that they cannot correct the oversampling of long spells. We also conclude...

Little attention has been paid to the finite-sample properties of tests for overidentifying restrictions in linear regression models with a single endogenous regressor and weak instruments. We study several such tests in models estimated by instrumental variables (IV) and limited-information...

This paper introduces a new approach to modeling the expanding universe of decision makers in the wake of growing awareness, and invokes the axiomatic approach to model the evolution of decision makers' beliefs as awareness grows. The expanding universe is accompanied by extension of the set of...

I examine the problem of maximizing the spread of information in a context where users of a network decide which piece of information is shared. A company thus provides initial information to some users and they then choose what to share to their neighbours. These actions of sharing and choosing...