Equilibrium Underdiversification and the Preference for Skewness

We develop a one-period model of investor asset holdings whereinvestors have heterogeneous preference for skewness. Introducingheterogeneous preference for skewness allows the model's investors,in equilibrium, to underdiversify. We find support for our model'sthree key implications using a dataset of 60,000 individualinvestor accounts. First, we document that the portfolio returnsof underdiversified investors are substantially more positivelyskewed than those of diversified investors. Second, we showthat the apparent mean-variance inefficiency of underdiversifiedinvestors can be largely explained by the fact that investorssacrifice mean-variance efficiency for higher skewness exposure.Furthermore, we show that idiosyncratic skewness, and not justcoskewness, can impact equilibrium prices. Third, the underdiversificationof investors does not appear to be coincidentally related toskewness. Stocks most often selected by underdiversified investorshave substantially higher average skewness—especiallyidiosyncratic skewness—than stocks most often selectedby diversified investors.     

Progressing Scottish enterprise

Scottish Enterprise, the body being formed from the amalgamation of the Scottish Development Agency (SDA) and the Training Agency (TA), will become operational on 1st April 1991. Its likely impact has been considered elsewhere (for example Moore, 1989; Hayton, 1989; Danson et al, 1989). The purpose of this article is to look at progress in setting up the new organization and to consider the characteristics of those who will be directing the activities of the Scottish Enterprise “core” and of the 13 Local Enterprise Companies (LECs) that will be responsible for delivering a range of economic development and training services.     

Making local labour markets work: A Scottish case study

With the launch of Employment Training (ET) in 1988 there has been increasing interest in providing training that is closely tied to the demands of the labour market. The establishment of ET came about because of a concern that unemployment was still very high at a time when large numbers of jobs were being created. Part of the explanation for this apparent paradox was that the unemployed lacked the motivation and skills to get jobs. The solution, as proposed by ET, was to provide counseling and training (Department of Employment, 1988). Insofar as this recognised that factors other than a lack of skills stopped the unemployed getting work it was to be welcomed. However there are other things that need to be taken account of if labour markets are to work effectively (Haughton and Peck, 1989). Many of these are outside of the control of the unemployed.     

Hoarding behavior among consumers: Conceptualization and marketing implications

In the western world, and in the United States in particular, there has been an abundance of food, materials and fuel over the past several decades. However, many futurists suggest this condition will soon change and a wide range of scarcities will result. Conditions in underdeveloped countries suggest one probable reaction to shortages in hoarding. In light of the predicted shortages this paper (1) develops definition and conceptualization of what constitutes hoarding, and (2) examines the influence hoarding activities have on channel decisions. An overriding purpose of the paper is to generate interest and research into the topic before conditions necessitate that concern.     

Farm demand for quality potato seed in Indonesia

Seed is the one of the most costly components of potato production in developing countries. Since potato is a vegetatively reproduced crop, diseases such as viruses build up and yield declines as tubers are saved from one harvest for use as seed the next season. Replacing farm‐saved seed with clean seed is one means to increase yield, but information asymmetry between buyers and sellers on seed quality may restrict market supply of this input. In this article we develop a model of the seed market in which clean seed is treated as a capital good providing benefits over several seasons. To determine farm demand for clean seed, we conducted a survey of 182 potato farmers in the major potato growing areas of Indonesia to elicit their perceptions of seed quality from different sources, and derive farmers' “willingness‐to‐pay” for quality potato seed. Results indicate that the effects of information asymmetry on seed supply may be partially offset by the “reputation” of specialized seed producers. Nevertheless, marginal returns to disease‐free seed appear to significantly exceed marginal costs, indicating that improving supply of quality seed will contribute strongly to productivity growth in potato. We discuss several policy options to encourage supply and utilization of quality potato seed.