Much has been written about innovation cooperation. But little research has been done to explain national differences thereof. Using macro and micro evidence from the fourth Community Innovation Survey, we econometrically investigate the extent to which national framework conditions account for...

El presente documento busca de manera indicativa explicitar algunos elementos conceptuales y prácticos para construir el problema acerca del tema, pues la diversidad de ángulos desde donde se lo aborda da la impresión de que el problema mismo no está conceptualizado de manera homogénea. En...

In spite of increased labour market participation in recent decades, women in Norway still have high part-time rates and seldom work more than their partners. Given that an aging population implies a projected large labour demand in many Western countries, it is important to explore potential...

Misclassification is found in many of the variables used in social sciences and, in practice, tends to be ignored in statistical analyses, and this can lead to biased results. This paper shows how to correct for differential misclassification in multilevel models and illustrates the extent to...

Group-level variance estimates of zero often arise when fitting multilevel or hierarchical linear models, especially when the number of groups is small. For situations where zero variances are implausible a priori, we propose a maximum penalized likelihood approach to avoid such boundary...

An additive multilevel item structure (AMIS) model with random residuals is proposed. The model includes multilevel latent regressions of item discrimination and item difficulty parameters on covariates at both item and item category levels with random residuals at both levels. The AMIS model is...

Reliable access to dependable, high quality childcare services is a vital concern for large numbers of American families. The childcare industry consists of private nonprofit, private for-profit, and governmental providers that differ along many dimensions, including quality, clientele served,...