Becoming Parents

Ninety-six lesbian adoptive parents were part of a cross-sectional study to explore their adoption experiences, specifically focusing on their sources of consultation/information and possible bias, adoption timeframes and costs, and their satisfaction with the adoption experience. Questions within each of these domains were tested for significant differences across international, private domestic and child welfare adoption venues. While their overall experiences were positive, several key significant findings are discussed, with practice considerations suggested for adoption professionals and other lesbians seeking adoption. Lastly, a call for future research is made to further our understanding of lesbian mothers' transition to adoptive parenthood.     

Exposure,Resistance and Life Expectancy: Disease and Death During the Economic Development of Japan, 1900–1960

By 1900 Japan was still extremely poor, rural and predominantly agrarian: but it had achieved effective mortality parity with the more economically advanced and/or wealthier countries of Western Europe. As standards of living rose, life expectancy remained relatively stagnant until the end of World War II. Subsequently, in spite of the economy being still partially crippled by wartime destruction, life expectancy in Japan increased very rapidly. The analysis of these puzzling trends is undertaken by means of an historical model of mortality change in which life expectancy is interpreted as the function of both the relative overall resistance of the population to disease, and the degree to which it was protected from exposure to the leading causes of death. It is argued that the early and late Japanese achievement of relatively high life expectancy at relatively low levels of income rested on the government's efficient delivery of a very high level of protection from exposure to disease. The middle period, 1910 to 1940, represented a relative failure of protection due to the concentration of financial resources on the military sector; a failure which better diets etc. could not effectively counter. The post-war period involved a return to higher levels of investment in public health during a period of technological progress and structural shifts which enhanced the efficiency of such investment.     

Maximum likelihood estimation for the proportional odds model with mixed interval-censored failure time data

This article discusses regression analysis of mixed interval-censored failure time data. Such data frequently occur across a variety of settings, including clinical trials, epidemiologic investigations, and many other biomedical studies with a follow-up component. For example, mixed failure times are commonly found in the two largest studies of long-term survivorship after childhood cancer, the datasets that motivated this work. However, most existing methods for failure time data consider only right-censored or only interval-censored failure times, not the more general case where times may be mixed. Additionally, among regression models developed for mixed interval-censored failure times, the proportional hazards formulation is generally assumed. It is well-known that the proportional hazards model may be inappropriate in certain situations, and alternatives are needed to analyze mixed failure time data in such cases. To fill this need, we develop a maximum likelihood estimation procedure for the proportional odds regression model with mixed interval-censored data. We show that the resulting estimators are consistent and asymptotically Gaussian. An extensive simulation study is performed to assess the finite-sample properties of the method, and this investigation indicates that the proposed method works well for many practical situations. We then apply our approach to examine the impact of age at cranial radiation therapy on risk of growth hormone deficiency in long-term survivors of childhood cancer.     

The Costs of Environmental Regulation in a Concentrated Industry

The typical cost analysis of an environmental regulation consists of an engineering estimate of the compliance costs. In industries where fixed costs are an important determinant of market structure, this static analysis ignores the dynamic effects of the regulation on entry, investment, and market power. I evaluate the welfare costs of the 1990 Amendments to the Clean Air Act on the U.S. Portland cement industry, accounting for these effects through a dynamic model of oligopoly in the tradition of Ericson and Pakes (1995). Using the two‐step estimator of Bajari, Benkard, and Levin (2007), I recover the entire cost structure of the industry, including the distributions of sunk entry costs and capacity adjustment costs. My primary finding is that the Amendments have significantly increased the sunk cost of entry, leading to a loss of between $810M and $3.2B in product market surplus. A static analysis misses the welfare penalty on consumers, and obtains the wrong sign of the welfare effects on incumbent firms.     

Competition and Coordination in Online Marketplaces

Online marketplaces, such as those operated by Amazon, have seen rapid growth in recent years. These marketplaces serve as an intermediary, matching buyers with sellers, whereas control of the good is left to the seller. In some cases, e.g., the Amazon marketplace system, the firm that owns and manages the marketplace system will also sell competing products through the marketplace system. This creates a new form of channel conflict, which is a focus of this article. We consider a setting in which a marketplace firm operates an online marketplace through which retailers can sell their products directly to consumers. We consider a single retailer, who currently sells its product only through its own website, but who may choose to contract with Amazon to sell its product through the marketplace system. Selling the product through the marketplace expands the available market for the retailer, but comes at some expense, e.g., a fixed participation fee or a revenue sharing requirement. Thus, a key question for the retailer is whether she should choose to sell through the marketplace system, and if so, at what price. We analyze the optimal decisions for both the retailer and the marketplace firm and characterize the system equilibrium.     

Price and Service Competition in an Outsourced Supply Chain

We consider a buyer who outsources the manufacturing of a product to multiple symmetric make‐to‐stock suppliers who compete on price and service (fill rate). The buyer allocates demand to the suppliers using a score function with an exponential form, which specifies the relative importance of price vs. service, in order to minimize his costs, while the suppliers choose their prices and fill rates to maximize their profits. For the case of dual‐sourcing, we characterize the optimal parameter of the exponential score function, considering the impact of the buyer's decisions on the suppliers, and considering how the suppliers compete against each other to earn a portion of the buyer's demand. We prove the existence of a unique equilibrium and characterize the equilibrium behavior of the system. We then consider a general number of suppliers and show that the equilibrium prices and fill rates, and the buyer's cost, are increasing in the number of suppliers. We compare these results to a model of single‐sourcing, in which the buyer is the Stackelberg leader and extracts all profits from the supplier. We find that the buyer always prefers single‐sourcing to multisourcing. Finally, we study a centralized system and use the results to develop a coordinating contract for the decentralized system.     

Santé au travail en Thaïlande: le processus de transition

La Thaïlande a connu une transition économique rapide, de l'agriculture aux secteurs manufacturier et tertiaire, puis vers l'emploi plus formel. Toutefois, la réglementation du marché du travail et la représentation des salariés sont moins affirmées que dans les pays développés, où cette transition s'est effectuée graduellement et plus lentement, il y a plusieurs décennies. Les auteurs examinent le renforcement des politiques et de la législation thaïlandaise sur la sécurité et la santé au travail en réponse aux normes internationales du travail, à l'adoption d'une nouvelle constitution démocratique, à la crainte d'embargos commerciaux étrangers et aux accidents mortels du travail. Ils concluent en identifiant les principaux défis auxquels sont confrontés les décideurs politiques, y compris l'application de la législation et les méthodes pour mesurer les nouveaux risques professionnels sur la santé mentale et physique des travailleurs.