... related to the variance (Ben-Akiva and Lerman 1985), is also estimated, where z is a set of relevant variables, including a time dummy and a dummy variable indicating whether the data are stated ... set formation, scale and temporal impacts into a random utility model of recreation demand We also assess the importance, in terms of statistical performance and welfare impacts, of the inclusion ... I also wish to express my thanks to the Social Sciences and Humanities Research Council of Canada for funding my research, to the James Copeland Scholarship for offering me its award in 2009 and...