statement of the problem: although all-ceramic restorations are broadly used, there is a lack of information concerning how their fit is affected by fabrication procedure and marginal configuration. purpose: the purpose of this study was to evaluate the marginal fit of zirconia cad/cam ceramic crowns before and after porcelain firing. the influence of finish line configuration on the marginal f...

Conventional benefit-cost analysis incorporates the normally reasonable assumption that the policy or project under examination is marginal. Among the assumptions this entails is that the policy or project is small, so the underlying growth rate of the economy does not change. However, this assumption may be inappropriate in some important circumstances, including in climate-change and energy p...

The tropics contain far greater numbers of species than temperate regions, suggesting that rates of species formation might differ systematically between tropical and non-tropical areas. We tested this hypothesis by reconstructing the history of speciation in New World (NW) land birds using BAMM, a Bayesian framework for modelling complex evolutionary dynamics on phylogenetic trees. We estimate...

A basic tenet of microeconomics is that for a competitive industry in equilibrium the market price of a product will be equal to its marginal cost. This paper develops a model framework and a corresponding empirical inference procedure for estimating longrun marginal cost in industries where production costs decline over time. In the context of the solar photovoltaic (PV) module industry, we re...

A class of semi-recursive kernel plug-in estimates of functions depending on multivariate density functionals and their derivatives is considered. The approach enables to estimate the production function, marginal productivity and marginal rate of technical substitution of inputs. The piecewise smoothed approximations of these estimates are proposed. The main parts of the asymptotic mean square...

Recurrent event analysis has been a topic that has generated much attention in the last few years. The analysis of recurrent event data can be a complex task, with many different relationships and dependencies that need to be specified. One aspect of recurrent events that is difficult to specify, and even more complex to justify, is the relationship a subject’s rate of failure will have as even...

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...