The Effects of Securitization on Mortgage Market Yields: A Cointegration Analysis

Securitization of the residential mortgage market has completely transformed the process of financing home loans in the U.S. over the last two decades. We examine the effects of securitization on yield spreads in the primary mortgage market. Cointegration techniques are employed to test the relationship between the increasing volume of mortgage securities over time and the yield spread on mortgage loan rates. We find that a 10% increase in the level of mortgage securitization as a proportion of total mortgage originations decreases yield spreads on home loans by as much as 20 basis points. Other results indicate that, while prepayment speed has a significant effect on mortgage yield spreads, default risk does not. We conclude that securitization of the residential mortgage market plays an important role in decreasing the cost of home loans.     

Quality uncertainty,brand reliance,and dissipative advertising

Consumers may have learned to generalize from usage experiences that nationally advertised, name-brand items tend to be higher in quality than unadvertised brands. Such generalization may have prompted the substitution of brand-name evaluations for search in quality assessments of nondurable experience goods. This paper offers theoretical arguments which suggest that if some consumers do not search, all firms in nondurable, experience goods markets can increase their profits if some substitute dissipative advertising (i.e., advertising which ignores information about product performance characteristics) of brand names for product quality enhancements. Undersearching by consumers invites firms to downgrade value in nondurable, experience goods markets. In support of the hypothesized substitution by consumers of brand-name evaluations for search in nondurable, experience goods markets, this paper reports results of a field experiment in which the influences on quality assessments of brand name and product composition were studied in two categories where dissipative advertising is heavily relied upon. Results suggest that branding is relied upon more heavily than search to assess quality, even when brand cues are inconsistent with actual quality levels and search is costless, suggesting that dissipative advertising can be extremely effective.     

The Political Economy of Bulimia Nervosa

Bulimia Nervosa constitutes a major social problem. There have, however, been few, if any, attempts to understand the distinctive features of this disorder from within the social sciences. Rather, the increasing prevalence of all forms of eating disorders are understood as a product of how the concepts of ‘femininity’ and the ‘controlled body’ are constructed within contemporary society. Bulimia and anorexia are ultimately seen to have their roots in the same social phenomena. While recognising the insights that the existing literature offers, we argue that in order to fully understand the rise of bulimia we must focus on the food system. More precisely, we must examine how the commercialisation of food preparation has led to a partial breakdown in meal structures and the rise of ‘everyday’ bingeing. The rise of extreme forms of disordered consumption associated with bulimia can be related to broader changes in the eating regime.     

Implementing organizational change in supply towards decentralization

This paper presents the findings from research in large companies investigating implementation issues faced by chief purchasing officers as their supply organization changed to greater decentralization. Once the decision was made to decentralize, responsibility for implementation was given to the chief purchasing officer (CPO). Firms changing their supply organization to a more decentralized structure faced a number of implementation issues, including the business unit concerns, role of the chief purchasing officer, top management involvement, changes to existing purchasing staff and the involvement of consultants. In the nine changes studied across seven companies, the decentralization process also required the CPO to address a number of simultaneous activities, including cost reduction objectives and implementation of information technology systems. A surprising “purchasing paradox” was also uncovered as top management still expected decentralized supply units to provide additional savings.     

Does advertising increase labour supply? Time series evidence from the UK

Wages in industrialized countries have risen considerably during the last 50 years, whereas hours worked, for manual workers at least, have decreased only marginally. In Europe, one policy response has been to attempt to protect workers from pressure to work long hours by placing legal restrictions on the amount of hours that may be worked each week. This paper examines the possibility that, in fact, observed hours may be the result of a desire of workers to work longer due to a shift in their preferences from leisure to increased consumption, caused by the huge increase in mass media advertising. A cointegrating VAR framework is used to test this hypothesis on UK time series data for both males and females from 1952 to 1997. Advertising is shown to be positively associated with hours worked for both male and female series. Causality tests indicate unidirectional causality, for males and females, from advertising to hours worked. These results suggest that the European policy response is more likely to restrict employee rather than employer discretion over hours.     

Pesticides,Preference Heterogeneity and Environmental Taxes

In this paper we present results from two choice experiments (CE), designed to take account of the different negative externalities associated with pesticide use in agricultural production. For cereal production, the most probable impact of pesticide use is a reduction in environmental quality. For fruit and vegetable production, the negative externality is on consumer health. Using latent class models we find evidence of the presence of preference heterogeneity in addition to reasonably high willingness to pay (WTP) estimates for a reduction in the use of pesticides for both environmental quality and consumer health. To place our WTP estimates in a policy context we convert them into an equivalent pesticide tax by type of externality. Our tax estimates suggest that pesticide taxes based on the primary externality resulting from a particular mode of agricultural production are a credible policy option that warrants further consideration.     

NONHOMOTHETIC GROWTH MODELS FOR THE ENVIRONMENTAL KUZNETS CURVE

We show the role of the elasticity of substitution between general consumption and the environment in environmental degradation. Specifically, our numerical experiments demonstrate, for a wide range of models, exponential utility generates the environmental Kuznets curve without adding any special assumptions. With exponential utility, the elasticity of substitution and hence the substitution effect between consumption and the environment are both decreasing in income. Hence, when income is low, society (the government) readily gives up environmental quality in return for more consumption, but it does not want to substitute consumption for the environment anymore, once it becomes wealthy enough.