Measuring small area variation in hospital use: site-of-care versus patient origin data.

There has been increasing attention paid to small area variation in hospital discharge rates. While there is general agreement about the importance of correcting for the migration of patients to hospitals outside their geographic area when constructing population-based hospital use rates for these small areas, there have been no studies of the sensitivity of simple correlations or multiple regression results to these adjustments. Given the paucity of patient origin data, which is needed to adjust hospital discharge rates for patient crossovers, the problems of measurement error present in the more readily available site-of-care data need to be addressed. This paper analyzes the variation in hospital discharge rates, both an unadjusted site-of-care rate and an adjusted patient origin rate, across the 68 counties in the lower peninsula of Michigan in 1980. The results indicate that both simple correlations and multiple regression results of these rates with socio-economic and health care resource characteristics of the counties are very sensitive to the specification of the discharge rate, with the analysis of the unadjusted rate potentially leading to incorrect policy recommendations. The explanatory power of the socio-economic characteristics is underestimated and that of health care resource measures most likely overestimated when the discharge rate is not adjusted for patient crossovers.     

THE RISK OF FIRE SALES IN THE TRI‐PARTY REPO MARKET

This paper studies the risk of “fire sales” in the tri‐party repo market, a large and important market where securities dealers find short‐term funding for a substantial portion of their own and their clients' assets. We distinguish between fire sales of assets by a dealer who, facing a run that could lead to default, sells securities to generate liquidity, and fire sales of assets by repo investors after a dealer's default has occurred. While fire sales do cause damage no matter how they arise, the tools available to lessen the harm from the two types of fire sales are different. We find that limited tools are available to mitigate the risk of predefault fire sales and that no established tools currently exist to mitigate the risk of postdefault sales. (JEL G01, G18)     

What is a multinational corporation? Classifying the degree of firm-level multinationality

The degree of firm-level multinationality is a key dimension that spans all theoretical frameworks, levels of empirical analysis and domains of investigation in international business research. There is, however, no agreed approach to defining or measuring firm-level multinationality. This is reflected in inconsistent approaches to sample selection and empirical testing, and it has curtailed the advancement of the discipline. We propose that instead of searching for the elusive, all-encompassing definition of an MNC, international business scholars should instead agree on a classification system for the degree of firm-level multinationality. We illustrate the advantages of this approach by constructing a simple classification system that takes into account the firm's breadth and depth of multinational engagements. We illustrate our matrix of firm multinationality by classifying a novel sample of over 1000 firms from seven countries, and we demonstrate how it can guide theory development and empirical testing. We also provide examples of potential future research directions.     

Pricing dynamics in US fresh produce channels: new empirical evidence

Despite many valuable contributions, prior research has not completely explained retail pricing behavior. This study employs scanner data for 36 fresh produce items analyzing the relationship between costs of goods sold and retail prices to provide further insight into retail pricing behavior. Implications include: (1) where ‘natural’ variation in produce prices do not already exist from the supplier, retailers appear to introduce the variation themselves, independent from shipping point price; and (2) to the extent that supplier-retailer contracts for fresh produce develop, the resulting stabilizing influence on costs may have the preserve effect of increasing retail price variability to consumers.     

Product—Market Choices and Growth of New Businesses

The relationship between product–market strategies and the growth of new firms is incompletely understood. The lack of understanding reflects the absence of a conceptual framework that would explain why certain product–market strategies achieve specified goals more effectively than do others. Prior research links product and market strategy to business growth, but does not clearly separate product line choices from market choices, and provides little guidance with respect to the sequence in which product and market changes should be made. Richard Cardozo, Karen McLaughlin, Brian Harmon, Paul Reynolds, and Brenda Miller propose a "wave" model of product–market choice, which yields hypotheses they evaluate with data from a subsample of 120 firms drawn from a representative sample of new businesses. Results yield preliminary guidelines for product–market strategy for managers of fledgling businesses.     

Can the traditional Asian US dollar peg exchange rate regime be extended to include the Japanese yen?

Using daily data for a select set of four Asian exchange rates, namely the Hong Kong dollar, the Singapore dollar, the Taiwan dollar and the Thailand baht, from October 1985 to October 2002, we apply principal components analysis and the O-GARCH model to describe the evolution and persistence in the correlations over time. We also estimate 2-, 3- and 4-variable multivariate GARCH models, without imposing the assumption of constant correlations, to investigate volatility interaction amongst the currencies. To allow for fat tails in the distributions of exchange rate changes, we use the multivariate student-t distribution in maximising our log-likelihood functions. Our results indicate the possibility of designing an Asian exchange rate system involving a number of the region's currencies.     

THE CAUSES OF VOLATILITY IN A SMALL,INTERNATIONALLY INTEGRATED STOCK MARKET: IRELAND,JULY 1975–JUNE 1994

I examine the causes of conditional volatility in a small, internationally integrated stock market using the Irish stock market as an example. I relate Irish stock market conditional volatility to British stock market conditional volatility and business cycle variables from July 1975 to May 1994. Exchange rate volatility is a more significant determinant of volatility in a small, internationally integrated stock market than is interest rate volatility. It follows that a potential benefit of membership in the European Monetary System may be reduced stock market volatility in the smaller member countries.     

A review of estimates of the schooling/earnings relationship, with tests for publication bias

In this paper we provide an analytical review of previous estimates of the rate of return on schooling investments and measure how these estimates vary by country, over time, and by estimation method. We find evidence of reporting (or “file drawer”) bias in the estimates and, after due account is taken of this bias, we find that differences due to estimation method are much smaller than is sometimes reported, although some are statistically significant. We also find that estimated returns are higher in the US and they have increased in the last two decades.