Variable returns to scale in general equilibrium theory once again

This paper relaxes some assumptions made by Jones (1968) and reconsiders the implications of variable returns to scale (VRS) for the Stolper-Samuelson and Rybczynski theorems. It also analyses for the first time the relationship between factor-returns and factor-supplies at constant commodity-prices. It is shown that the validity of the Rybczynski and/or Stolper-Samuelson theorem is neither necessary nor sufficient for the production possibilities frontier to be locally strictly concave to the origin. Several other new results are derived and an attempt is made to give an intuitive explanation of the most important findings.     

Is there a liability of foreignness in global banking? An empirical test of banks' X‐efficiency

When a company operates outside of its home country, it may suffer a ‘liability of foreignness.’ Does this a priori theoretical expectation hold in the global banking industry? Banks increasingly compete outside of their home countries, and operating environments often differ sharply across countries, both in terms of financial markets and credit risk. In this paper, we report the results of an empirical test of the liability of foreignness in the global banking industry, using Fitch–IBCA BankScope data for the period 1989–96. Our findings strongly support the liability of foreignness hypothesis. Further, the data show some evidence that the X‐efficiency of a foreign‐owned bank is strongly influenced by the competitiveness of its home country and the host country in which it operates. Lastly, we find that in some environments U.S.‐owned banks are more X‐efficient than other foreign‐owned banks in some environments, but less X‐efficient in others. Copyright © 2002 John Wiley & Sons, Ltd.     

Bayesian Analysis of Structural Changes in a Linear Regression Model: An Application to Rupee-Dollar Exchange Rate

Journal of Quantitative Economics - The objective of this paper is to find the points of structural shift in the exchange rate model under a Bayesian framework which incorporates the possibility of...     

From Fatwallet to eBay: An investigation of online deal-forums and sales promotions

Sales promotions are an important part of retail advertising strategy. Traditionally, research on sales promotions has generally assumed that the buyers are end consumers who do not engage in reselling, in large part due to high transaction costs. However, the recent Internet related technologies have dramatically lowered the cost of transferring goods between consumers, leading to relative ease of reselling activity amongst individual consumers. Little is known about the impact of this phenomenon on retailer's sales promotion strategy. In this research we investigate the reselling activity in online auctions for products that active deal seekers can obtain at deeply discounted prices from retailers. We further investigate the role of deal-forums in the resale process. Data is collected from an online deal-forum (http://www.fatwallet.com/) and eBay to test various reselling-related hypotheses. The results show that there is a significant abnormal increase in the number of newly posted auctions of a product after the deal information of this product is posted on deal-forum website. We also find that there is a significant price incentive for individuals to resell. The implications for sales promotion research and practice are discussed.     

Is newer better? Penn World Table Revisions and their impact on growth estimates

This paper sheds light on two problems in the Penn World Table (PWT) GDP estimates. First, we show that these estimates vary substantially across different versions of the PWT despite being derived from very similar underlying data and using almost identical methodologies; that the methodology deployed to estimate growth rates leads to systematic variability, which is greater: at higher data frequencies, for smaller countries, and the farther the estimate from the benchmark year. Moreover, this variability matters for the cross-country growth literature. While growth studies that use low frequency data remain robust to data revisions, studies that use annual data are less robust. Second, the PWT methodology leads to GDP estimates that are not valued at purchasing power parity (PPP) prices. This is surprising because the raison d’être of the PWT is to adjust national estimates of GDP by valuing output at common international (purchasing power parity [PPP]) prices so that the resulting PPP-adjusted estimates of GDP are comparable across countries. We propose an approach to address these two problems of variability and valuation.     

Innovations in Retail Business Models

A retail business model articulates how a retailer creates value for its customers and appropriates value from the markets. Innovations in business models are increasingly critical for building sustainable advantage in a marketplace defined by unrelenting change, escalating customer expectations, and intense competition. Drawing from extant strategy and retailing research, we propose that innovations in retail business models are best viewed as changes in three design components: (1) the way in which the activities are organized, (2) the type of activities that are executed, and (3) the level of participation of the actors engaged in performing those activities. We propose six major ways in which retailers could innovate their business models to enhance value creation and appropriation beyond the levels afforded by traditional approaches to retailing. We also describe the drivers of business model innovations, the potential consequences of such innovations, and numerous examples from retail practice that highlight our concepts and arguments. In doing so, we provide a starting point for academic research in a domain that is deficient in theoretical and empirical research, and offer retailing managers a framework to guide retail business model innovations for sustainable competitive advantage.