Efficiency and concentration

Baumol, Panzar, and Willig [1982] introduced the idea that there may be efficiency gain from merger of two or more firms. This paper shows that the Debreu [1951]-Farrell [1957] type index suggested by Färe [1986] to calculate the gain in efficiency from merger of firms can be related to a concentration formula. We then introduce a dominance relation consistent with the ordering generated by the Färe gain function. Next, it is shown that a normalized form of the gain function satisfying a homogeneity condition becomes a subclass of the Hannah-Kay [1977] concentration indices. A limiting case of this subclass becomes the entropy-based index of concentration.The editor of this paper was Rolf Färe.I wish to express sincere gratitude to Shmuel Nitzan for bringing my attention to this problem. Comments and suggestions from Rolf Färe, Alexis Jacquemin, and two anonymous referees are acknowledged with thanks.     

Growth,deregulation and rent seeking in post-war British economy

Post-war political consensus about the need for government action to rectify market failure began to unravel in the 1970s, and even the need for prudential control of banking and finance began to be challenged by the start of the 1980s. Regulatory oversight was relaxed in the belief that emerging techniques in financial engineering would render irrelevant fears of sharp periodic downturns that have historically been the consequence of lightly regulated finance. The outcome of this new policy, embracing the idea of unregulated markets to deliver greater prosperity, is disappointing. We find that the average growth rate of UK GDP and output per person employed for three decades from the start of liberalization was no greater than that in the previous three post-war decades. Cyclical fluctuations were deeper. A remarkable feature of the second period is the sharp rise in income inequality in favour of the very top earners. An illusion of greater prosperity for a wider segment may have been created in the second period due to asset price bubbles and housing inflation.     

THE CHOICE OF TRADING VENUE AND RELATIVE PRICE IMPACT OF INSTITUTIONAL TRADING: ADRs VERSUS THE UNDERLYING SECURITIES IN THEIR LOCAL MARKETS

We address two important themes associated with institutions’ trading in foreign markets: (1) the choice of trading venues (between a company's listing in its home market and that in the United States as an American Depositary Receipt [ADR]) and (2) the comparison of trading costs across the two venues. We identify institutional trading in both venues using proprietary institutional trading data. Overall, our research underscores the intuition that the choice of institutional trading in a stock's local market or as an ADR is a complex process that embodies variables that measure the relative adverse selection and liquidity at order, stock, and country levels. Institutions route a higher percentage of trades to more liquid markets, and these trades are associated with higher cumulative abnormal returns. We also find that institutional trading costs are generally lower for trading cross‐listed stocks on home exchanges even after controlling for selection bias.     

Experimental Evidence on Product Adoption in the Presence of Network Externalities

The benefits accruing to a purchaser of a product due to the existing base of consumers of the same or compatible products are known as network externalities. This paper studies Katz and Shapiro's (1986) model of network externalities in an experimental setting. Two sellers choose prices for competing technologies sold to two groups of four buyers purchasing sequentially in two stages. The results are qualitatively consistent with Katz and Shapiro's equilibrium predictions. In certain sessions over three-quarters of first stage buyers purchase the more expensive technology anticipating that later arriving buyers will also buy this technology. In periods where a strong network has been established for a technology in the first stage, over 80 percent of second stage buyers buy that technology, even though in most cases it is priced higher. The data, however, differ from the point predictions of the model.     

Are there arbitrage gaps in the UK gilt strips market?

Evidence in financial markets of an opportunity for pure arbitrage, and therefore a violation of the law of one price, is considered an anomaly to be noted. This paper reports an apparent violation of the law of one price between UK government gilts and their separately traded principal and coupon strips over a sample period of nearly 14 years. There are persistent price differences, and hence opportunities for arbitrage, after allowance for the bid-ask spread; the strips package tends to be overpriced in relation to the corresponding gilt. The price differences may, in part, be due to a lack of liquidity and stale prices in the strips market.     

Inequality, Polarisation and Welfare: Theory and Applications

In this paper we explore the possibility of using the Atkinson (1970) – Kolm (1969) – Sen (1973) general ethical index in polarisation measurement. It is shown that though inequality and polarisation are two dissimilar concepts, different indices of inequality may be used to generate alternative indices of polarisation. A numerical illustration based on Indian household expenditure survey data is provided using several polarisation indices.     

Decimals And Liquidity: A Study Of The Nyse

Using a carefully constructed matched sample of control (nondecimal) stocks, we isolate the effects of decimalization for a sample of NYSE‐listed common stocks trading in decimals. We find that the quoted depth as well as the quoted and effective bid‐ask spreads declined significantly following decimalization. Additionally, both the number of trades and trading volume declined significantly. Stock return volatilities display an initial increase but a decline over the longer term, probably as traders become more comfortable in their new milieu.     

Changing patterns of UK poverty, 1997 2004

It has been noted that the failure to meet the target set bythe government for reducing the head count ratio of child povertyin Britain is partly due to the success of government policyin generating economic growth. Apart from ignoring the argumentthat absolute poverty is not a meaningful idea, this apologyfor the failure of government to meet poverty targets also misseswider problems embedded in recent trends in the household incomedistribution. For example, inequality measures sensitive tothe distribution of income amongst the poor suggest that theexperience of those who remained poor may have worsened.     

A Generalized Human Development Index

The human development index indicates achievement in the living standard of a population in terms of attainment levels of different quality–of–life attributes, such as educational attainment and life expectancy at birth. This paper axiomatically characterizes a general measure of achievement. This achievement index, which contains the UNDP human development index as a special case, can be regarded as a generalized human development index. The general index allows calculation of the percentage contributions of individual attributes to overall achievement and hence to identify the attributes that are more/less susceptible to achievement. This kind of breakdown becomes important from a policy point of view. The paper provides an empirical illustration of the axiomatically characterized indices.