How accurate is a log-linear approximation of the New Keynesian model when the nominal interest rate is bounded by zero? This paper compares the solution of the exact non-linear model to the log-linear approximation. It finds that the difference is modest. This applies even for extreme events in...

Investment ratings (e.g., by Morningstar) provide a simple ordinal scale (e.g., 1 to 5) for comparing investments. Typically, ratings are assigned within categories — groups of assets sharing common characteristics — but using the same ordinal scale for all groups. Comparing such categorized...

In applied econometric work, analysts are concerned often with estimation of and inferences about interaction effects, e.g. 'Does the magnitude of the effect of z1 on y depend on z2? ' This paper develops tests for and proper interpretation of various forms of interaction effects in one...

The paper reviews the Argentine debt experience in the past ten years. The emphasis is on the interaction between relative prices, financial instability, budget .deficits, inflation and debt accumulation. A longer run perspective shows that the continuing fiscal problems have stood in the way of...

This paper explores the links between exports, export destinations and skill utilization by firms. We identify two mechanisms behind these links, which we integrate into a unified theory of export destinations and skills. First, exporting to high-income countries with higher valuation for...

This essay considers some prescriptions that are currently popular regarding exchange rate regimes: a general movement toward floating, a general movement toward fixing, or a general movement toward either extreme and away from the middle. The whole spectrum from fixed to floating is covered...