The sustainability of a defined benefit pay-as-you-go (DBPAYG) pension system is investigated in the context of an overlapping-generations model of endogenous fertility with heterogeneous agents. The model places particular emphasis on the time costs of child rearing. It illustrates the...

Welfare comparisons between funded and pay-as-you-go (PAYG) pension systems are often made using the Aaron condition. However, the Aaron condition as usually stated is not precise enough about the exact form of the PAYG pension system. PAYG pension systems can be either of the defined-benefit or...

Three theoretical benchmark models of diffusion of new technologies are the substitution, mortality and social-learning models. These models tend to generate symmetric, right-skewed and left-skewed S-curves respectively. The empirical literature has focused primarily on fitting either Logistic...

We show how small to medium sized cities can make use of the cellular automata (CA) approach to integrate land use data and other GIS based data with inter-active scenario evaluation. In our model development we put particular focus on the interdependency between transport infrastructure supply...

Many widely used models, including proportional hazards models with un- observed heterogeneity, can be written in the form (Y ) = min[ 0 X + U; C], where is an unknown increasing function, the error term U has unknown distribution function and is independent of X, C is a random censoring...

The failure of human capital theory to explain firm related effects on wages, new empirical approaches to internal labor markets, and new work on careers have all led to a recent surge in interest in how firm internal structure, and the jobs within firms, help determine wages. The least...

Thie study attempts to examine changes that have occurred in the extent of internatinal capital flows over the past three decades. In addition, the paper investigates the influence of changes in large economies interest rates on rates in smaller economies. Empirical results of the study show...

This paper establishes the theoretically appropriate definition and treatment of capital gains and depletion. Failure to distinguish capital gains on natural assets from depletion causes NNP to me mismeasured. For resource rich countries this can lead to large spurious fluctuations in NNP. In...