Deregulating Overtime Hours Restrictions on Women and its Effects on Female Employment: Evidence from a Natural Experiment in Japan

This paper provides novel evidence on the effect of deregulating overtime hours restrictions on women by using the 1985 Amendments to the Labour Standards Act (LSA) in Japan as a natural experiment. The original LSA of 1947 prohibited women from working overtime exceeding two hours a day; six hours a week; and 150 hours a year. The 1985 Amendments exempted a variety of occupations and industries from such an overtime restriction on women. Applying a difference‐in‐difference model to census data, we find causal evidence pointing to the positive effect of this particular piece of labour market deregulation on the proportion of female employment. We then carry out a series of sensitivity analyses to ensure the robustness of our finding. Especially, we conduct a falsification test and an event study to show that our causal inference is not threatened by the differential pretreatment trends. Finally, we use quantile regressions and find that for jobs with more rapidly growing proportion of female employment, the effect of the exemption from the overtime work restriction on women is larger.     

INSUFFICIENT ENTRY OF EMPLOYEE‐CONTROLLED FIRMS IN A FREE‐ENTRY OLIGOPOLY

This study is a theoretical examination of whether employee‐controlled firms (ECFs) enter a free‐entry oligopolistic market excessively or insufficiently, from the viewpoint of welfare maximization. The excess entry theorem is well known in oligopoly theory. According to this theorem, a greater number of profit‐maximizing firms enter a free‐entry oligopolistic market than is optimal for welfare maximization. We demonstrate the possibility that insufficient entry arises when ECFs compete in a free‐entry market. In particular, we show that if both the demand and cost functions are convex, insufficient ECF entry necessarily occurs. Our results suggest that competition among firms seeking purposes other than profit might lead to insufficient entry because differences in competing firms’ objectives affect the intensity of market competition.     

Interregional economic-demographic model of the Tokyo region

The Tokyo Metropolitan Area consists of four prefectures, and experienced a rapid social inflow of population from other areas in 1960s, and a removal of residential population from CBD to suburban cities within the Area in 1970s. Tokyo prefecture at the centre functioned as CBD, and showed a continuous growth of economic activities, while the leading sector changed from secondary to tertiary sector. The number of daily commuters to Tokyo prefecture has increased to two million persons. Thus in the Tokyo prefecture several variables like social inflow, employment in secondary sector and residential population reached to historical highest values in late 1960s and early 1970s, An economic-demographic model is constructed by pooling data of four prefectures for 1965–1979 to describle these rapid changes in four prefectures.

The model consists of seven blocks (population, commutation, employment, production, income and expenditure, capital stock, price) and contains 142 equations. Social movement of residential population is explained by per capita income, housing stock, endowment of social overhead capital, and land price. Daily commuters are explained by labor productivities. Private and public investments are endogenously explained in the model. Potential type variables of income and population are used to describe the interregional linkages in various equations. After final test the model could properly explain the turning point period of Tokyo, and drastic changes of Metropolitan Area. The model is then applied to the forecast up to 1990, and several simulation studies to clarify various policy effects.     

The Contributions of Professors Fischer Black,Robert Merton and Myron Scholes to the Financial Services Industry

This paper is written as a tribute to Professors Robert Merton and Myron Scholes, winners of the 1997 Nobel Prize in economics, as well as to their collaborator, the late Professor Fischer Black. We first provide a brief and very selective review of their seminal work in contingent claims pricing. We then provide an overview of some of the recent research on stock price dynamics as it relates to contingent claim pricing. The continuing intensity of this research, some 25 years after the publication of the original Black–Scholes paper, must surely be regarded as the ultimate tribute to their work. We discuss jump‐diffusion and stochastic volatility models, subordinated models, fractal models and generalized binomial tree models for stock price dynamics and option pricing. We also address questions as to whether derivatives trading poses a systemic risk in the context of models in which stock price movements are endogenized, and give our views on the ‘LTCM crisis’ and liquidity risk.     

Economic Regulation in the Consumer Loans Market

Atlantic Economic Journal - This paper models a consumer loan market with a vertical structure where an upstream monopolist supplies funds to downstream nonbanks. The nonbanks supply funds to...     

Adverse workplace conditions, high-involvement work practices and labor turnover: Evidence from Danish linked employer-employee data

Using Danish linked employer-employee data, we find that: (i) exposing the worker to physical hazards leads to a 3 percentage point increase in the probability of voluntary turnover from the average rate of 18%; (ii) working in night shift results in an 11-percentage point hike; and (iii) having an unsupportive boss leads to a 6-percentage point jump. High involvement work practices are found to play a significant role in mitigating the adverse effects of workplace hazards. Finally, the worker under adverse workplace conditions is found to improve the 5-year odds of rectifying such workplace adversities by quitting the firm.     

On the Uniqueness of the Welfare–maximizing Number of Firms Under Cournot Oligopoly

Under Cournot oligopoly with a homogeneous product, we present a sufficient condition that guarantees the uniqueness of the welfare–maximizing number of firms to attain the global maximum level of welfare by implementation of a piecemeal policy changing the number of firms gradually. We adopt Selten's (1973) 'fitting–in function' method, which relates an individual firm's output to an industry's output. When the number of firms is unique, then introducing a lump–sum profit tax (subsidy) can attain the optimal level of welfare. Indirect entry regulation is superior to direct entry regulation from the standpoint of welfare if each entrant engages in rent–seeking activities.