In this paper, we present estimates of several models of demand for a natural area using data from surveys on visitors and non-visitors. The estimates take into account the problems of: demand specification, measurement of the cost and of the demand, choosing sampling scheme, and handling the...

In a large sample of Swedish unemployed disabled workers, the workers participate in between zero and ten policy programmes during their unemployment spell. Clustering of programmes to about half of the sample is prominent. <p> The number of programmes is modelled as a standard count data model, as...</p>

In a large sample of Swedish unemployed disabled workers, the workers participate in between zero and ten policy programmes during their unemployment spell. Clustering of programmes to about half of the sample is prominent. <p> The number of programmes is modelled as a standard count data model, as...</p>

An original dataset referring to a medium-sized Italian university is implemented for analyzing the determinants of scientific research production at individual level. Three different indicators, based on the number of publications and/or citations, are considered. Their distributions are highly...

The demand for certain types of health care services depends on decisions of both the individual and the health care provider. This paper studies the conditions under which it is possible to separately identify the parameters driving the two decision processes using only count data on the total...

In a large sample of Swedish unemployed disabled workers, the workers participate in between zero and ten policy programmes during their unemployment spell. Clustering of programmes to about half of the sample is prominent. The number of programmes is modelled as a standard count data model, as...