Campbell (1993) has employed a log-linearized approximation to an aggregate budget constraint to show how the ratio of consumption to total (human and non-human) wealth summarizes agents’ expectations concerning both future labor income and future asset returns. A problem with implementing this approach empirically is the unobservability of human wealth. Recently, Lettau and Ludvigson (2001a) h...

Labor is direct input of human work always accounted for as being a foreground input. Direct labor is accounted for as working hours or years applied and the quality of the worker (unskilled, trained, educated, etc) using Unit Emergy Values for labor based on level of training and education (seJ/person/time). In practice, however, the emergy value of direct labor is computed through the money p...

While large POS(part-of-speech) annotated corpora play an important role in natural language processing, the annotated corpus requires very high accuracy and consistency. To build such an accurate and consistent corpus, we often use a manual tagging method. But the manual tagging is very labor intensive and expensive. Furthernaore, it is not easy to get consistent results from the humari expert...

We thank reviewers from the Committee on Population at the National Academy of Sciences for useful comments. We also thank Vijaya Ramachandran for excellent research assistance and for especially helpful discussions and suggestions. The research reported here is part of the NBER's research program in Labor Studies. Any opinions expressed are those of the authors and not those of the National Bu...

sociologists have long been interested in the study of the relationships between members of families. also, in the last decades, sociologists and scholars in social and human sciences have shown an interest in the study of the effects of globalization on the micro and macro structures of societies. the aim of this paper is to investigate the relationship between globalization and the division o...

Recent evidence suggests that leukocytes infiltrate uterine tissues at or around the time of parturition, implicating inflammation as a key mechanism of human labor. MCP-1 (also known as C-C chemokine motif ligand 2, CCL-2) is a proinflammatory cytokine that is up-regulated in human myometrium during labor. Myometrium was collected from pregnant rats across gestation and at labor. Total RNA and...

Biology and Gender in the Labor Market Can biology help us to better understand gender differences in labor market behavior and outcomes? This chapter reviews the emerging literature which sheds light on this question, considering research in four broad areas: i) behavioral endocrinology; ii) human genetics; iii) neuroeconomics; and iv) sensory functioning and time-space perceptions. JEL Classi...

Do Downward Private Transfers Enhance Maternal Labor Supply? Evidence from around Europe Drawing on a theoretical model of downward private transfers with endogenous labor supply and recursive econometric models based on 2317 mother-daughter pairs from the 2003 SHARE data on 10 European countries, we investigate the impact of private transfers on the career choices of transfer-receiving young m...

The labor-intensive nature of harvest in the tree fruit industry makes it particularly sensitive to labor shortages. Technological innovation is thus critical in order to meet current demands without significantly increasing prices. This paper introduces a robotic system to help human workers during fruit harvest. A second-generation prototype is currently being built and simulation results dem...

Marx conceives of labor as form-giving activity. This is criticized for presupposing a “productivist” model of labor which regards work that creates a material product — craft or industrial work — as the paradigm for all work (Habermas, Benton, Arendt). Many traditional kinds of work do not seem to fit this picture, and new “immaterial” forms of labor (computer work, service work, etc.) have de...