Default, foreclosure, and strategic renegotiation / 1542

Includes bibliographical references (p. 21-24)

Occupational Gender Segregation and Women's Wages in Canada: An Historical Perspective

We document the evolution of occupational gender segregation and its implications for women's labour market outcomes over the twentieth century. The first half of the century saw a considerable decline in vertical segregation as women moved out of domestic and manufacturing work into clerical work. This created a substantial amount of horizontal segregation that persists to this day. To study the effects of occupational segregation on the gender gap, we introduce a decomposition technique that divides the gap into between-occupation and within-occupation components. Since the 1990s the component attributable to within-occupation wage differentials has become predominant. Nous traçons un portrait de l'évolution de la ségrégation professionnelle selon le sexe au 20ième siècle, et de ses conséquences sur la condition féminine dans le marché du travail. Dans la première partie du 20ième siècle, la ségrégation professionnelle hiérarchique ou verticale a considérablement déclinée alors que les travailleuses quittaient les emplois de domestique et du secteur manufacturier en faveur des emplois de bureau. Ceci créa néanmoins une importante ségrégation professionnelle horizontale qui persiste jusqu'à aujourd'hui. Pour étudier les effets de la ségrégation professionnelle sur l'écart salarial selon le sexe, nous présentons une technique de décomposition qui divise l'écart salarial en deux composantes: l'une due aux différences intra-occupations et l'autre due aux différences inter-occupations. Depuis le début des années 90, la composante intra-occupation est prédominante.Occupational segregation, gender wage gap, pay equity, economic history, Ségrégation professionnelle, équité salariale, écart salarial selon le sexe, histoire économique

Rhythms of social interaction: messaging within a massive online network

We have analyzed the fully-anonymized headers of 362 million messages exchanged by 4.2 million users of Facebook, an online social network of college students, during a 26 month interval. The data reveal a number of strong daily and weekly regularities which provide insights into the time use of college students and their social lives, including seasonal variations. We also examined how factors such as school affiliation and informal online friend lists affect the observed behavior and temporal patterns. Finally, we show that Facebook users appear to be clustered by school with respect to their temporal messaging patterns

Local Search in Unstructured Networks

We review a number of message-passing algorithms that can be used to search through power-law networks. Most of these algorithms are meant to be improvements for peer-to-peer file sharing systems, and some may also shed some light on how unstructured social networks with certain topologies might function relatively efficiently with local information. Like the networks that they are designed for, these algorithms are completely decentralized, and they exploit the power-law link distribution in the node degree. We demonstrate that some of these search algorithms can work well on real Gnutella networks, scale sub-linearly with the number of nodes, and may help reduce the network search traffic that tends to cripple such networks.Comment: v2 includes minor revisions: corrections to Fig. 8's caption and references. 23 pages, 10 figures, a review of local search strategies in unstructured networks, a contribution to `Handbook of Graphs and Networks: From the Genome to the Internet', eds. S. Bornholdt and H.G. Schuster (Wiley-VCH, Berlin, 2002), to be publishe