Simplifying Regression Models Using Dimensional Analysis

Dimensional analysis can make a contribution to model formulation when some of the measurements in the problem are of physical factors. The analysis constructs a set of independent dimensionless factors that should be used as the variables of the regression in place of the original measurements. There are fewer of these than the originals and they often have a more appropriate interpretation. The technique is described briefly and its proposed role in regression discussed and illustrated with examples. We conclude that dimensional analysis can be effective in the preliminary stages of regression analysis whendeveloping formulations involving continuous variables with several dimensions.     

THE ROLE OF THE GOLD STANDARD IN KEYNESIAN MONETARY THEORY

This paper shows that many of the most distinctive features of Keynesian economics are best understood if one views the General Theory as essentially a gold standard model. A close examination of Keynes's statements on contemporaneous policy issues suggests that the gold standard had a profound impact on his views on monetary policy effectiveness. In particular, I show that the liquidity trap has been widely misunderstood. Finally, I argue that post–General Theory developments in Keynesian economics are best understood as a response to the inapplicability of Keynes's original message to a world of fiat money regimes. ( JEL B22, E12, N1)     

Beyond taxonomy

Much of the considerable confusion about the definition of social entrepreneurship in academic literature stems from a lack of empirical research on the subject. This article advances social entrepreneurship research beyond conceptualization discussions by developing and validating an instrument that quantifies the incidence of nonprofit entrepreneurial behavior. Information from 145 Kansas City Metropolitan Area nonprofit organizations was collected to validate the underlying constructs represented in the instrument. Behavior differences were depicted between entrepreneurial and nonentrepreneurial nonprofits. Using principal component factor analysis, the research illustrates social entrepreneurship as a unique nonprofit behavior that occurs at the intersection of innovation, proactiveness, and risk taking.     

The Timing of Cohabitation and Engagement: Impact on First and Second Marriages

Using a multistate sample of marriages that took place in the 1990s, this study examined associations between premarital cohabitation history and marital quality in first (N = 437) and second marriages (N = 200) and marital instability in first marriages (intact N = 521, divorced N = 124). For first marriages, cohabiting with the spouse without first being engaged or married was associated with more negative interaction, higher self‐reported divorce proneness, and a greater probability of divorce compared to cohabiting after engagement or marriage (with patterns in the same direction for marital positivity). In contrast, there was a general risk associated with premarital cohabitation for second marriages on self‐reported indices of marital quality, with or without engagement when cohabitation began.     

Treating Serious Emotional and Behavioural Problems Using Multisystemic Therapy

Multisystemic therapy (MST) is a family‐ and community‐based treatment of serious emotional and behavioural problems presented by adolescents. The development of this model began in the late 1970s, and today MST is a leading evidence‐based treatment of serious antisocial behaviour in youths, with programs transported to more than 30 states in the United States and 12 nations, including Australia and New Zealand. This article rerviews the theoretical rationale that underlies MST and presents the central clinical features of the intervention model. In addition, the training and quality assurance protocols used to promote MST program fidelity and treatment adherence are described. Finally, findings from approximately 15 published randomised and two quasi‐experimental clinical trials with youths presenting serious clinical problems (e.g., violence, substance abuse, serious emotional disturbance, sexual offending, and chronic illness) are summarised.     

U.S. ratification of the CRC and reducing child poverty: can we get there from here?

If the United States finally ratifies the United Nations Convention of the Rights of the Child (CRC), will it improve the country's to effectively combat child poverty and thereby improve child well-being? This article addresses this and related questions in two ways. First, the authors examine how ratification of the CRC has influenced the efforts of other wealthy Anglophone countries to reduce child poverty. Second, they draw on lessons learned from these other countries' efforts to generate predictions about America's postratification future. The authors conclude that, while the CRC is a compelling, practical tool, a communications strategy and business plan are necessary complements to achieve desired results.     

NEIGHBORHOOD POVERTY AND NONMARITAL FERTILITY: SPATIAL AND TEMPORAL DIMENSIONS

Data from 4,855 respondents to the Panel Study of Income Dynamics were used to examine spatial and temporal dimensions of the effect of neighborhood poverty on teenage premarital childbearing. Although high poverty in the immediate neighborhood increased the risk of becoming an unmarried parent, high poverty in surrounding neighborhoods reduced this risk. The effect of local neighborhood poverty was especially pronounced when surrounding neighborhoods were economically advantaged. Measuring exposure to neighborhood poverty over the childhood life course yielded stronger effects than measuring exposure at a single age. Neither racial differences in the level of poverty in proximate neighborhoods nor racial differences in neighborhood poverty over the childhood life course explained the racial difference in nonmarital fertility.