Optimum invariant tests for random manova models

Consider the canonical-form MANOVA setup with X: n × p = (+ E, X_i n_i × p, i = 1, 2, 3, M_i: n_i × p, i = 1, 2, n₁ + n₂ + n₃) p, where E is a normally distributed error matrix with mean zero and dispersion I_n (> 0 (positive definite). Assume (in contrast with the usual case) that M₁i is normal with mean zero and dispersion I_n1) and M₂2 is either fixed or random normal with mean zero and different dispersion matrix I_n2 (being unknown. It is also assumed that M₁ E, and M₂ (if random) are all independent. For testing H₀) = 0 versus H₁: (> 0, it is shown that when either n₂ = 0 or M₂ is fixed if n₂ > 0, the trace test of Pillai (1955) is uniformly most powerful invariant (UMPI) if min(n₁, p)= 1 and locally best invariant (LBI) if min(n₁ p) > 1 underthe action of the full linear group Gl (p). When p > 1, the LBI test is also derived under a somewhat smaller group G_T(p) of p × p lower triangular matrices with positive diagonal elements. However, such results do not hold if n₂ > 0 and M₂ is random. The null, nonnull, and optimality robustness of Pillai's trace test under Gl(p) for suitable deviations from normality is pointed out.     

From undesirable immigrant to model minority: The success story of Chinese in New Zealand

Attitudes of the wider society towards Chinese in New Zealand have undergone a substantial change within the past 30 years, from the negative ‘undesirable immigrant’ to a highly positive ‘model minority’. Unlike many other ethnic minorities in New Zealand, Chinese are seen now to be an extremely acceptable group. This article examines some of the historical and social events that have culminated in this dramatic change in attitude.     

The role of mediatory myths in sustaining ideology: the case of Cuba after the ‘special period’

After the collapse of the Soviet bloc, management researchers devoted considerable energy to investigating ways to operate the transition to market economies. However, one country of the former Soviet bloc, Cuba, resisted transition and reaffirmed loyalty to the values of La Revolucion. Little is known about management in Cuba. This study seeks to approach one particular aspect of management in this country: the relationship between national ideology and management practice. To analyse the topic, qualitative data from Cuban managers and management professors were gathered over a 10‐year period. Results suggest that the dynamics of managerial ideology can be understood as the interplay of several processes operating at distinct levels: institutional, professional, organizational and individual. The interplay between conformance to the ideology and its use as a practical resource is a potential source of change and of conflict demands that are tackled with recourse to mediatory myths.     

The Effect of Couple Disagreement about Child‐Timing Intentions: A Parity‐Specific Approach

Using couple data from a longitudinal study conducted in Italy, a country with persistently low fertility levels, we examined the effect of partners' discrepant child‐timing intentions on reproductive behavior. We found that the effect of couple disagreement on subsequent fertility is parity‐specific and does not depend on whether only the male or the female partner intends to have a(nother) child. The disagreement tends to produce an intermediate childbearing outcome at parities zero and one, while the outcome is shifted more toward agreement on not having a(nother) child at parity two. The empirical evidence suggests that gender equality in reproductive decisionmaking is not driven by partners' equal bargaining power or partners' equal access to economic resources. The findings indicate that the predictive power of child‐timing intentions strongly improves if both partners' views are considered in fertility models, and thus support the adoption of couple analysis in fertility research.     

Let's stay close: An examination of the effects of imagined contact on behavior toward children with disability

In line with current developments in indirect intergroup contact literature, we conducted a field study using the imagined contact paradigm among high-status (Italian children) and low-status (children with foreign origins) group members (N = 122; 53 females, mean age = 7.52 years). The experiment aimed to improve attitudes and behavior toward a different low-status group, children with disability. To assess behavior, we focused on an objective measure that captures the physical distance between participants and a child with disability over the course of a five-minute interaction (i.e., while playing together). Results from a 3-week intervention revealed that in the case of high-status children imagined contact, relative to a no-intervention control condition, improved outgroup attitudes and behavior, and strengthened helping and contact intentions. These effects however did not emerge among low-status children. The results are discussed in the context of intergroup contact literature, with emphasis on the implications of imagined contact for educational settings.     

The Redistributive Effects of the Tax Wedge in Italy

Abstract. This paper presents an original data set of microdata on the tax wedge in Italy, obtained by using the microsimulation model ITAXMOD, developed at ISPE (Institute for Studies on Economic Planning). These data are used to measure the components of the tax wedge and their burden on the total cost of labour at the individual level. The results have been aggregated across income brackets, socio-economic groups and sectors of employment. These data are the necessary preliminary input for any redistributive analysis and in addition they make the available data for Italy comparable with those of other countries. Scant attention has been paid up to now to the redistributive aspects of the tax wedge, since most analyses are based on the income of the “average production worker” which is far from an ideal standard for comparison. The computation of the tax wedge for different brackets of total labour cost has been explored in two ways. The first is related to the differing weights of the components of the tax wedge on cost of labour and no particular hypothesis has been made about the incidence of these components. The results show that the burden of personal income taxation and of social security contributions is very high even for wage-earners in the lowest brackets (in 1992, the estimated tax wedge is more than 44% of total labour cost even in the second decile of the labour cost). That might discourage both labour supply and labour demand across the entire spectrum of deciles of cost of labour. The second line of research studies the incidence of personal income taxes and employees' social security contributions on gross earnings, under the maintained hypothesis that these two components of the tax wedge are shouldered by the employees.