New Market Power Models and Sex Differences in Pay

In the context of certain general equilibrium search models, it is possible to infer the elasticity of labor supply to the firm from the elasticity of the quit rate with respect to the wage. We use this framework to estimate the elasticity of labor supply for men and women workers at a chain of grocery stores operating in the southwestern United States, identifying separation elasticities from differences in wages and separation rates across different job titles within the firm. We estimate elasticities of labor supply to the firm of about 2.7 for men and about 1.5 for women, suggesting significant wage-setting power for the firm. Since women have lower elasticities of labor supply to the firm, a Robinson-style monopsony model might explain lower relative pay of women in the grocery industry. The wage gaps we observe among workers in US retail grocery stores are close to what the monopsony model predicts for the elasticities we have estimated.monopsony papers, labor supply, grocery stores, elasticity

Estimating the Firm's Labor Supply Curve in a "New Monopsony" Framework: School Teachers in Missouri

In the context of certain dynamic models, it is possible to infer the elasticity of labor supply to the firm from the elasticity of the quit rate with respect to the wage. Using this property, we estimate the average labor supply elasticity to public school districts in Missouri. We take advantage of the plausibly exogenous variation in pre-negotiated district salary schedules to instrument for actual salary. Instrumental variables estimates lead to a labor supply elasticity estimate of about 3.7, suggesting the presence of significant market power for school districts, especially over more experienced teachers. The presence of monopsony power in this labor market may be partially explained by institutional features of the teacher labor market.labor monopsony, teachers

Modern Models of Monopsony in Labor Markets: A Brief Survey

This brief survey contains a review of several new empirical papers that attempt to measure the extent of monopsony in labor markets. As noted originally by Joan Robinson, monopsonistic exploitation represents the gap between the value of a worker's marginal product and the worker's wage, and it represents both a distortion in the allocation of resources and an income transfer away from workers. The evidence surveyed from a fairly broad range of labor markets suggests that monopsony may be far more pervasive than is sometimes suggested.imperfect labor markets, monopsony

The Changing Occupational Distribution by College Major

In this paper we examine the occupational distribution of individuals who hold bachelor degrees in particular fields in the United States using data from the various waves of the National Survey of College Graduates. We propose and calculate indexes that describe two related aspects of the occupational distribution by major field of study: distinctiveness (how dissimilar are the occupations of a particular major when compared with all other majors) and variety (how varied are the occupations among those who hold that particular major). We discuss theoretical properties of these indices and statistical properties of their estimates. We show that the occupational variety has increased since 1993 for most major fields of study, particularly between the 1993 and 2003 waves of the survey. We explore reasons for this broadening of the occupation distribution. We find that this has not led to an increase in reported mismatch between degree and occupation

Manager ethnicity and employment segregation

Using nine years of personnel records from a regional grocery store chain in the United States, this study examines the effect of manager ethnicity on the ethnic composition of employment at the firm's 73 stores. We estimate separate models with store fixed effects for several departments and job titles at each store. We first compare the rates at which Hispanic employees are hired under Hispanic and non-Hispanic, white managers, and then examine the effects of manager-employee ethnic differences on separations and on transfers between stores. We find significant effects of manager ethnicity on hiring patterns in the four job positions that are in small departments, but not in the two positions in larger departments. Manager-employee ethnic dissimilarity has no significant effects on transfers, and affects rates of employee separations in only one case

Sex differences in pay in a new monopsony model of the labor market

We use a simple framework, adopted from general equilibrium search models, to estimate the extent to which monopsony power (or labor market frictions) can account for gender differences in pay, using data from a chain of regional grocery stores. In this framework, the elasticity of labor supply to the firm can be inferred from estimates of the elasticity of the separation rate with respect to the wage. We identify elasticities of separation from differences in wages and separation rates across job titles and across different years. We estimate elasticities of labor supply to the firm of about 3.5 for men and about 2.7 for women, suggesting significant wage-setting power for the firm. The differences in estimated elasticities of labor supply predict wage differences that are close to the observed male/female wage differences at the firm

Estimating the firm's labor supply curve in a new monopsony framework: school teachers in Missouri

In the context of certain dynamic models, it is possible to infer the elasticity of labor supply to the firm from the elasticity of the quit rate with respect to the wage. Using this property, we estimate the average labor supply elasticity to public school districts in Missouri. We take advantage of the plausibly exogenous variation in pre-negotiated district salary schedules to instrument for actual salary. Instrumental variables estimates lead to a labor supply elasticity estimate of about 3.7, suggesting the presence of significant market power for school districts, especially over more experienced teachers. The presence of monopsony power in this labor market may be partially explained by institutional features of the teacher labor market

Intrafirm Mobility and Sex Differences in Pay

In this paper we analyze eight years of employment data of a regional grocery store chain in the U.S. The data include job titles, wage rates, and earnings for all employees. We examine initial job assignments, mobility between departments, and mobility into supervisory and management positions in the firm. We model the flows of individuals between different departments and jobs within the firm as a Markov process. The estimated transition probabilities imply that expected seniority is greater for women. We find a pattern of intrafirm mobility and initial job assignment that generally penalizes women, even after taking account of individuals' characteristics

Pension plan characteristics and framing effects in employee savings behavior

In this paper we document the importance of framing effects in the retirement savings decisions of college professors. Pensions in many post-secondary institutions are funded by a combination of an employer contribution and a mandatory employee contribution. Employees can also make tax-deferred contributions to a supplemental savings account. A standard lifecycle savings model predicts a dollar-for-dollar tradeoff between supplemental savings and the combined regular pension contributions made on behalf of an employee. Contrary to this prediction, we estimate that each additional dollar of employee contributions leads to a 70 cent reduction in supplemental savings, whereas each dollar of employer contributions generates only a 30 cent reduction. The asymmetry which is consistent with different mental accounts for employer and employee contributions provides further evidence of the sensitivity of individual savings decisions to the precise details of their pension plan

Fame and the fortune of academic economists: How the market rewards influential research in economics

We analyze the pay and position of 1,009 faculty members who teach in doctoral-granting economics departments at fifty-three large public universities in the United States. Using the Web of Science, we have identified the journal articles published by these scholars and the number of times each of these articles has been subsequently cited in published research articles. We find that research influence, as measured by various measures of total citations, is a surprisingly strong predictor of the salary and the prestige of the department in which professors are employed. We also examine how coauthorship is rewarded by the market