We study environments where a production process is jointly shared by a finite group of agents. The social decision involves the determination of input contribution and output distribution. We define a competitive solution when there is decreasing-returns-to-scale which leads to a Pareto optimal outcome. Since there is a finite number of agents, the competitive solution is prone to manipulation...

We propose an extended PAYG social security system that conditions pension benefits on the aggregate wage sum and on the wage of one’s children. The latter increases parents’ incentives to provide their children with good within-family education. However, since wages depend stochastically on parents’ unobservable investment in their children’s human capital, some insurance against the productiv...

The S0 → S1 transition of the oxygen-evolving complex (OEC) of photosystem II is one of the least understood steps in the Kok cycle of water splitting. We introduce a quantum mechanics/molecular mechanics (QM/MM) model of the S0 state that is consistent with extended X-ray absorption fine structure spectroscopy and X-ray diffraction data. In conjunction with the QM/MM model of the S1 state, we ...

Conventional benefit-cost analysis incorporates the normally reasonable assumption that the policy or project under examination is marginal. In particular, it is assumed that the policy or project does not change the underlying growth rate of the economy. However, this assumption may be inappropriate in some important circumstances, notably responding to climate change. One example is the benef...

This paper characterizes the optimal linear financial transaction tax in an equilibrium model of competitive financial markets. As long as investors hold heterogeneous beliefs about the returns of assets in fixed supply and the planner calculates welfare using any single belief, we expect the optimal tax to be positive, even when a fraction of trading is fundamental. Strikingly, the optimal tax...

In enhanced annuities, the annuity payment depends on one’s state of health at some contracted date while in ”standard annuities”, it does not. The focus of this paper is on an annuity market where ”standard” and enhanced annuities are offered simultaneously. When all insured know equally well on their future health status either enhanced annuities drive standard annuities out of the market or ...

Project-financing and public-private partnership schemes are joint projects of investment that are generally submitted to investment valuation criteria based on compound discounting. However, the theoretical basis of these criteria is at issue nowadays. According to recent studies on relational contracting economics and behavioral finance, joint projects of investment can be considered as speci...

This paper provides a critique of the global crusade recently launched by the World Bank and World Health Organization against tobacco, by providing some welfare estimates of the net costs associated from the rise in taxes that is proposed for India, S.Africa, S.Korea, Japan and the European Union. It critically examines conventional studies of the costs-benefits of smoking which besides ignori...