The main purpose of our paper is to present a model which allows a comparison of different types of technology policies to be made. It appears that there is a kind of model which is appropriate to that purpose but which belongs to the theory of the firm. Indeed, one of the characteristics of...

Counterfactual conditional statements are ubiquitous in any scientific endeavour. This paper contains an analysis of the nature of counterfactual conditionals and the conditions under which they are considered assertable by scientists. The paper then applies this analysis to the use of...