The economics of time use Introduction : time use data in economics Gerard A. Pfann Nobody to play with : the implications of leisure coordination Lars Osberg Estimates of a labor supply function using alternative measures of hours of work N. Anders Klevmarken Loafing or learning : the demand for informal education Rene Fahr Timing constraints and the allocation of time : the effects of changing shopping hours regulations in the Netherlands Peter Kooreman Time use and child costs over the life C Ray Rees Mondays in the sun : unemployment time use and consumption patterns in Spain Arantza Ugidos Reconciling motherhood and work : evidence from time use data in three countries Anna Sanz de Galdeano The distribution of childrens developmental resources W. Jean Yeung A study in the process of planning designing and executing a survey program : the BLS American time use survey Diane Herz The timing and flexibility of housework and men and womens wages Nina Smith Routine Daniel S. Hamermesh. These studies are based on information on time use in nine countries. Such studies will become more common as more governments fund time budget surveys and as economists realize the benefits of using this type of data. Each does something that either could not have been accomplished at all or that could have been done much less convincingly on the data that one typically obtains from households. Part I deals with the when and with whom questions describing human behavior. These questions have been essentially ignored by social scientists generally and have been completely ignored by economists. So long as we believe that people have preferences over the timing and the context of their activities we should be able to apply economic analysis usefully to their decisions. Part II deals with what is done questions of the quantities and determinants of economic activities.While many of these questions have been addressed using readily available retrospective data time diary data allow both recording them more accurately and the kind of disaggregation by type that is not possible with other kinds of data. Part III deals with childrens issues the determination of time spent at home with children and its impacts on the parents and on the children themselves. Here we have economic analyses using detailed time diary data and special survey questions that have not heretofore been used to address these topics. Part IV consists of a single study focussed on the issues involved in the creation of the American Time Use Survey (ATUS) which began full scale operations in January 2003 These studies are based on information on time use in nine countries. Such studies will become more common as more governments fund time budget surveys and as economists realize the benefits of using this type of data. Each does something that either could not have been accomplished at all or that could have been done much less convincingly on the data that one typically obtains from households. Part I deals with the when and with whom questions describing human behavior. These questions have been essentially ignored by social scientists generally and have been completely ignored by economists. So long as we believe that people have preferences over the timing and the context of their activities we should be able to apply economic analysis usefully to their decisions. Part II deals with what is done questions of the quantities and determinants of economic activities.While many of these questions have been addressed using readily available retrospective data time diary data allow both recording them more accurately and the kind of disaggregation by type that is not possible with other kinds of data. Part III deals with childrens issues the determination of time spent at home with children and its impacts on the parents and on the children themselves. Here we have economic analyses using detailed time diary data and special survey questions that have not heretofore been used to address these topics. Part IV consists of a single study focussed on the issues involved in the creation of the American Time Use Survey (ATUS) which began full scale operations in January 2003