Local Economic Opportunity and the Competing Risks of Internal and U.S. Migration in Zacatecas,Mexico1

This article uses a competing risks model to examine the effects of origin economic conditions on the probability of temporary U.S. and internal labor migration in the Mexican state of Zacatecas. We measure origin economic conditions with municipal‐level indices of employment and small‐scale investment opportunities that we constructed from population and economic census data. The results of our analysis demonstrate the important influence of local employment and investment opportunities on migration outcomes. Controlling for the prior municipal rate of U.S. return migration and other factors, positive opportunities for small‐scale investment are associated with a higher risk of temporary migration to the United States. This result is consistent with investment oriented migration predicted by the new economics of labor migration theory. We also find comparable social network effects for both internal and U.S. migration. Having social ties to active migrants of one type (U.S. or internal), encourages migration of the same type and discourages migration of the other type.     

Rhythm in Mother‐Infant Interactions

Rhythmic behavior and the association of vocal rhythmic behavior with language development were studied in a sample of 30 mother‐infant dyads. Dyads were observed in 2 contexts (1 involved sharing pictures and the other sharing musical toys) when infants were 18 and 24 months of age. Vocal rhythmic behavior was seen in both contexts, and in both contexts mothers matched their infant's vocal rhythmic behavior at greater than chance rates. Greater matching tended to be associated with higher language scores whereas, counter to prediction, higher rates of maternal vocal rhythmic behavior tended to be associated with lower language scores. At 24 months of age, mother‐daughter dyads showed more matching than mother‐son dyads. These results suggest that differences in maternal production of vocal rhythmic behavior may foster different language learning strategies.     

Anchoring in lie detection revisited

Previous research has shown that the human lie detector tends to interpret messages as truthful rather than as deceptive (the truthfulness bias) and to infer attitudes congruent with the content of the (sometimes deceptive) messages (over-attribution). It was hypothesized that these effects are moderated by the extent to which receivers are anchored to the verbal content of the message; that is, receivers might form an early impression of the content and fail to adjust this impression sufficiently even if the message appears false. In the present study, receivers either judged the truthfulness of the message first and the sender's attitude second, or judged the sender's attitude first and truthfulness second, or judged only the sender's attitude. We proposed that having to judge truthfulness first would interfere with the role of the verbal content as an anchor for the receiver's impression. Consistent with this rationale, the results showed that both truthfulness bias and overattribution diminished when receivers judged truthfulness first compared to when receivers judged attitudes first or judged only attitudes.     

The effect of attitudes on emotional reactions to expressive displays of political leaders

One hundred subjects participated in an experiment to assess emotional reactions to the expressive displays of political leaders. Attitudes were assessed through questionnaire items, and facial EMG, heart rate, and skin conductance were recorded while subjects watched silent expressive displays of intense happiness/reassurance, mild happiness/reassurance, and anger/threat by President Reagan and Senator Hart. Half of the subjects reported their global affective reaction during each display, and all subjects reported discrete emotional reactions following each display. For Reagan, main effects were found for display type and for prior attitude in the self-report scales and in facial EMG, although significant Prior Attitude X Display interactions indicated that the intense happiness/reassurance displays most strongly differentiated supporters from opponents. Main effects were found for Hart's displays on the self-report scales and on facial EMG, and post hoc analyses revealed attitude effects. These results support previous research concerning affective reactions to dynamic expressive displays of emotion, but they also show the possible influence of prior attitude toward the expressor on both somatic and subjective measures of emotional response.This research was supported by National Science Foundation Grant SES 83-10176 and the Lincoln Filene Endowment to Dartmouth College and was part of a collaborative project involving Professors Roger D. Masters and Denis G. Sullivan of the Government Department at Dartmouth College. The authors thank Alice Feola for her assistance in preparing the stimulus videotapes. Lauren Bush is now at the Department of Psychology, University of Washington, Seattle, WA. John Lanzetta, our friend and colleague, who contributed so much to this project, died in October 1989 after a year-long illness.     

Immigrant characteristics and Hispanic-Anglo housing inequality

This paper seeks to explain why Hispanic households in the United States live in housing markedly inferior to Anglos’. I argue that immigrant characteristics of Hispanic households and the metropolitan areas in which Hispanics live play important roles in determining such inequality in the housing market. Empirical analyses of homeownership, household crowding, and housing costs demonstrate that immigration plays a role in explaining relatively low homeownership and high household crowding for each of four large Hispanic populations (Mexicans, Puerto Ricans, Cubans, and other Hispanics). The role of immigrant characteristics in determining housing costs is much weaker.     

Improving the Regulation of Carcinogens by Expediting Cancer Potency Estimation1

The statutory language of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65; California Health and Safety Code 25249.5 et seq.) encourages rapid adoption of “no significant risk levels” (NSRLs), intakes associated with estimated cancer risks of no more than 1 in 100,000. Derivation of an NSRL for a carcinogen listed under Proposition 65 requires the development of a cancer potency value. This paper discusses the methodology for the derivation of cancer potencies using an expedited procedure, and provides potency estimates for a number of agents listed as carcinogens under Proposition 65. To derive expedited potency values, default risk assessment methods are applied to data sets selected from an extensive tabulation of animal cancer bioassays according to criteria used by regulatory agencies. A subset of these expedited values is compared to values previously developed by regulatory agencies using conventional quantitative risk assessment and found to be in good agreement. Specific regulatory activities which could be facilitated by adopting similar expedited procedures are identified.