Randomization and the American put

While American calls on non-dividend-paying stocks may be valuedas European, there is no completely explicit exact solutionfor the values of American puts. We use a technique called randomizationto value American puts and calls on dividend-paying stocks.This technique yields a new semiexplicit approximation for Americanoption values in the Black-Scholes model. Numerical resultsindicate that the approximation is both accurate and computationallyefficient.     

THE BRITISH PETROLEUM STOCK OFFERING: AN APPLICATION OF OPTION PRICING

With the world's economic health said to be banging in the balance, Britain announced that it would proceed with its offering of British Petroleum Co. shares…. Never has a single stock offering so galvanized the attention of Wall Street, world capital markets and investors.
-Wall Street Journal, October 30, 1987     

Reflections on longitudinal action research with the English National Health Service

This paper reflects on a longitudinal collaborative action research programme between the Centre for Research in Strategic Purchasing and Supply and the UK National Health Service Purchasing and Supply Agency that has operated since 1995. During the collaboration, research has changed practice and practice has changed research. A framework for analysing change is introduced as a means of examining how supply strategy has changed during the course of the research. The framework is applied to three supply strategy cases of prosthetics, clinical waste and cardiology, illustrating how practice and research have changed and influenced the production of knowledge over time. The methodological, theoretical and managerial implications of such longitudinal action research programmes are reflected on.     

Rough and lonely road to prosperity: a reexamination of the sources of growth in Africa using Bayesian model averaging

This paper takes a fresh look at Africa's growth experience by using the Bayesian model averaging (BMA) methodology. BMA enables us to consider a large number of potential explanatory variables and sort out which of these variable can effectively explain Africa's growth experience. Posterior coefficient estimates reveal that key engines of growth in Africa are substantially different from those in the rest of the world. More precisely, it is shown that mining, primary exports and initial primary education exerted differential effect on African growth. These results are examined in relation to the existing literature. Copyright © 2008 John Wiley & Sons, Ltd.     

Two‐level CES Production Technology in the Solow and Diamond Growth Models*

The two‐level CES aggregate production function—that nests a CES into another CES function—has recently been used extensively in theoretical and empirical applications of macroeconomics. We examine the theoretical properties of this production technology and establish existence and stability conditions of steady states under the Solow and Diamond growth models. It is shown that in the Solow model the sufficient condition for a steady state is fulfilled for a wide range of substitution parameter values. This is in sharp contrast with the two‐factor Solow model, where only an elasticity of substitution equal to one is sufficient to guarantee the existence of a steady state. In the Diamond model, multiple equilibria can occur when the aggregate elasticity of substitution is lower than the capital share. Moreover, it is shown that for high initial levels of capital and factor substitutability, the effect of a further increase in a substitution parameter on the steady state depends on capital–skill complementarity.     

WORLDOUTLOOK

German monetary unification is expected to result in a major expansion in autonomous demand from East Germany. In economic terms this is equivalent to a fiscal shock to West Germany broadly similar to that experienced in the US in the early years of Mr. Reagan's Presidency. Led by the Bundes bank, the monetary authorities' response is again likely to be a tightening of policy, leading to several years of high real interest rates. Overall, the combined monetary-fiscal shock should strengthen growth with only moderate increases in inflation. Germany is expected to grow very rapidly in the -per cent range for several years, with only a slight upturn in inflation. Japan, after a pause over the next year, should be able to return to its under lying growth path fairly quickly. However the US situation is more precarious. FUN adjustment from the previous Reagan shock has not yet taken place, leaving the US vulnerably dependent on increasingly scarce imported capital. In the absence of a significant *peace dividend: the result is the necessity of continued tight policy and sluggish growth in the American economy. US growth stays around 2 per cent, but this allows a substantial reduction in the current account deficit.     

MEASURING POVERTY – WHAT HAPPENED TO COPENHAGEN?

Absolute poverty can be thought of as a condition of 'insufficiency', i.e. the inability to acquire the basic necessities of life. Relative poverty can be thought of as a condition of 'inequality'. At the World Summit on Social Development in Copenhagen in 1995, all participants made a commitment to produce official measures of both absolute and relative poverty and to strive to eradicate absolute poverty within a reasonable time frame. Despite these commitments, measures of absolute poverty are rare in the developed world. This paper concludes that both kinds of measures are needed for intelligent discussions and good policy-making.     

Hospital Numerical Flexibility and Nurse Economic Security in China and India

This article contrasts the flexibility of Chinese and Indian urban hospitals and the security of nurses. The study draws on a survey of 55 urban hospitals, and finds that national context generates different flexibility–security outcomes even when workers with similar skills are considered. Our findings support claims that China is constructing a flexibility–security regime that aims to promote both security and flexibility, and that India remains attached to employer‐based social protection, but challenges the claim that economic growth is higher in China because India's employers have relatively less capacity to utilize labour‐time as they wish.