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Multiple regression analysis has been widely used by researchers to analyze complex social problems since the 1950s. A specialization in economics, known as econometrics, developed out of a recognition that multiple regression is based upon a large number of assumptions--many of which are commonly ...

Multiple regression analysis has been widely used by researchers to analyze complex social problems since the 1950s. A specialization in economics, known as econometrics, developed out of a recognition that multiple regression is based upon a large number of assumptions--many of which are commonly violated in specific applications, as well as a variety of corrective measures for estimating regression models in the presence of many of the violations. Unfortunately, the mathematical sophistication required to understand the econometrics literature started out high and has continued to rise over the years. As a consequence, an understanding of the assumptions of the regression model, tests for violations, and corrective estimation approaches have failed to permeate widely many other policy-related disciplines such as political science, social work, public administration, and sociology. This book should help to ameliorate this situation by presenting a detailed and accessible discussion of multiple regression and limited-dependent variable models in the context of policy analysis.

Regression periods play a central role in the psychological development of the human baby. Studies of infants have identified 10 periods of regression, or a return to a high frequency of mother-infant contact, within the first 20 months of life. These periods of emotional insecurity in the child ...

Regression periods play a central role in the psychological development of the human baby. Studies of infants have identified 10 periods of regression, or a return to a high frequency of mother-infant contact, within the first 20 months of life. These periods of emotional insecurity in the child signal forthcoming periods of developmental advance and the emergence of an array of new skills as a consequence of parent-infant conflict over body contact and the renegotiation of old privileges. Although the basic idea in this book is an old one, the authors believe that regression periods deserve further study and have identified four questions of central importance today: Can the phenomenon of regression periods as found by Dutch researchers in 1992 be replicated in other countries and cultures? What environmental conditions have an effect on these regression periods and how? Are there physical conditions in infants that show a non-linear distribution over age similar to regression periods? Have brain changes been detected since the review of Fischer & Rose (1994) at other ages than the six reported by them, and, if yes, how do these relate to the ages at which regression periods are found? Forming the core of this book, the replication studies performed in Sweden, Spain, and England provide support that regression periods are a real phenomenon and should be dealt with accordingly whenever developmental processes in infancy are discussed.