In this paper we propose a stochastic formulation of the materials balance condition which imposes physical constraints on production technologies. The estimation of the model involves a composed error term structure that is commonly applied in the literature on stochastic frontier analysis of...

Classical finance has undergone a major change in recent years. In our modern world, where risk becomes more complex and difficult to calculate, more sophisticated mathematical techniques and products are needed to quantify such new risks. The financial sector should have a solid structure in...

In the home-care services industry, caregivers drive to visit patients scattered in a district and deliver various care services at the patient's home. We use a unique data set, with a standard panel structure, recording the hours of service and the exact number of miles traveled by each...

Chapter 1. Introductory Developments -- Chapter 2. The Simple Regression Model -- Chapter 3. The Multiple Regression Model -- Chapter 4. Heteroskedasticity and Autocorrelation of Errors -- Chapter 5. Problems With Explanatory Variables -- Chapter 6. Distributed Lag Models -- Chapter 7. An...

This paper examines empirically the relationship between innovation and market structure within a simultaneous framework at the industry level of aggregation. We use a model in which R&D affects both, demand and cost conditions. An optimization process leads to optimal industry R&D expenditure...