Monte Carlo validation studies of clustering algorithms, including Ward's minimum variance hierarchical method, are reviewed. Caution concerning the uncritical selection of Ward's method for recovering cluster structure is advised. Alternative explanations for differential recovery performance are explored and recommendations are made for future…

Problems of developing countries that could be addressed with studies of time use are identified and associated methodological issues are discussed. Time use studies investigate how individuals allocate time among various activities. Such studies have revealed sex and age differences in time spent at work among adults and children of various…