On 2014 Nov 30, Tetyana Pudrovska commented:
Dear Hilda, thank you for your thoughtful and insightful comments and for engaging in this dialogue. It was a pleasure to ponder over the points you made and to consider our methodology, data, and findings from another perspective. Below are some of my thoughts.
1. The measure of depression does not have a clear clinical relevance. Different terms are used interchangeably. Each item is coded 0 or 1.
The most widely used term for the CES-D scale is depressive symptoms. We also use depression because it is a very general term that doesn’t refer to a clinical diagnosis. Depression is not a disease in the DSM, “major depressive disorder” is.
The CES-D items (like almost all other measures of self-reported physical and mental health) are highly skewed because most people report no depressive symptoms. Hence, the dichotomization of each item. We conducted a variety of sensitivity analyses using different coding approaches for the outcome, such as averaging all items and taking a natural log to reduce the positive skew, and the findings were remarkably similar.
The issue of using continuous scales vs binary diagnoses has received a lot of attention in sociology of mental health. Both approaches have strengths and weaknesses. Our findings hold in a variety of alternative models when we use a binary measure with a cutoff at the 75th percentile or at 10+ symptoms.
Sociologists typically prefer continuous scales because they are better for capturing the stressful consequences of social inequality. Unlike clinicians, sociologists are interested in the full spectrum of mental health, not only its negative extremes. To uncover the effects of social structures and social relationships on individual mental health, we need a continuum from mild to very severe that enables us to compare social groups on this scale. Binary diagnoses can obscure important differences because people who have, for example, 5 symptoms are in the same category as people who have no symptoms.
Because the effects documented in our study are large in magnitude and statistically significant after adjustment for many factors that are traditionally used to explain women’s higher depression, our findings provide important insights into the psychological consequences of social arrangements.
Ultimately, clinical relevance is not consistent with the brunt of our argument. One of the major implications of our study is that a higher level of depression among women in authority positions is not a clinical issue that can be addressed by diagnosing and treating specific individuals. It’s a social issue that should be addressed at the macro-level of society and the meso-level of organizations.
2. The observed differences in depression may reflect not the effect of job authority itself but the effects of many other job characteristics that differ between men and women with job authority.
The workplace situation is certainly not equal between men and women in authority positions. It is well-documented that in the same occupations and at the same levels of human capital characteristics, women have lower earnings, lower autonomy, and lower levels of many other desirable workplace characteristics than men.
Yet, the gender difference in depression documented in our study is not due to the differences in other job characteristics between men and women. Our models control for all these variables, and the effects of job authority are observed after we take all other job characteristics into account.
In addition to multiple regression, we use counterfactual approach to improve causal inference. It’s also called a “quasi-experimental” design because it simulates random assignment in an experiment. Our approach matches people with job authority (the “treatment” group) and people without job authority (the “control” group) in 1993 on many characteristics, including baseline depression, education, occupation, earnings, weekly hours, job characteristics and job satisfaction, marriage, parenthood, and early-life characteristics, especially parents’ socioeconomic resources. By matching people, we make the two groups as similar as possible with the exception of job authority and then see how depression changes over time based on people’s authority status in 1993.
It is also important that we conduct not only between-gender comparisons but also within-gender comparisons. Women with job authority have more depressive symptoms compared to women without job authority. In contrast, men with job authority have lower depression than men without job authority. What’s striking is that women with job authority in our study are socially advantaged in terms of most socioeconomic characteristics that are strong predictors of positive mental health. These women have more education, higher income, more prestigious occupations, and higher levels of job satisfaction and job autonomy than women without job authority. By all traditional models of socioeconomic status and health women with job authority should fare better than lower-status women. Yet we find the opposite.
3. Absence of direct measures of interpersonal stress, harassment, and prejudice.
Ideally we’d certainly like to have all possible measures of interpersonal stress and discrimination. But such a data set simply does not exist. The Wisconsin Longitudinal Study (WLS) that we use is currently among the best for our purposes. We are doing more work with other data sets, including the National Longitudinal Surveys, but all data have their advantages and limitations. So we are launching our own data collection. The current study, by documenting these patterns and providing a theoretically and empirically grounded interpretation, makes an important contribution and one of the first steps to address an important social issue.
The WLS has very rich array of measures of job characteristics. We include all variables that are considered main stressors in traditional theories of work stress. Yet, the effect of job authority persists net of these traditional explanations, which bolsters the indirect evidence for the mechanisms we propose.
The WLS started in 1957 and is still ongoing. We have information about our participants’ employment histories for the last 55 years. Job authority (but not depression) was measured for the first time in 1975 when our participants were 36 years old. We used this earlier measure of job authority in related articles that are all components of a larger project.
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