Unaffiliated voters

According to the conventional wisdom, political parties are hurt by unaffiliated voters (those who are not registered as Democrats or Republicans). These independents are irresponsible and unpredictable. Recent election law reforms throughout the country have encouraged affiliation by restricting voting in a primary to party members. This study examines the effect of the closed primary system in Connecticut. Research found that since the advent of the primary, the proportion of voters registered as unaffiliated has undergone a steady decline. But the decline in the proportion unaffiliated, however, does not appear to have strengthened partisan commitments. Rather it has changed the meaning of unaffiliated registration. In the past unaffiliated voters tended to be Democrats. Today they are equally likely to be either party.     

Heteroskedasticity in the Tobit model

The paper deals with parameter estimation and the testing of individual parameters in heteroskedastic Tobit models. The statistical properties of semiparametric and maximum likelihood estimators are evaluated. Correspondingt-test statistics are compared. Results from a Monte Carlo experiment indicate that the semiparametric estimator performs relatively better than the maximum likelihood estimator. The associatedt-test statistics appear to perform better than the corresponding maximum likelihood test statistics. *** DIRECT SUPPORT *** A06GP002 00008     

Organizational changes at a postal sorting terminal—their effects upon work satisfaction, psychosomatic complaints and sick leave

This paper describes a longitudinal study evaluating organizational changes at a postal sorting terminal in Sweden. One hundred postal workers were followed up for 1 year after the changes were put in place. Information about psychosocial factors, sleep disturbances and gastrointestinal complaints were collected by questionnaires administered at the onset of the changes and at 8 and 12 months later. Sick leave during the 1-year follow up was compared with that during the year before the changes were introduced. A significant increase in skill discretion and in authority over decisions occurred during the study period. The reported increase in skill discretion and authority over decisions correlated with a reduction in difficulties with sleep and with gastrointestinal complaints. Changes in reported contact with team mates and superiors also correlated with changes in the reporting of sleep difficulties and gastrointestinal complaints. There was a significant reduction in sick leave. The results indicate that the organizational changes improved the quality of work and at the same time reduced sick leave and psychosomatic complaints.