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Nan Lin

Bio: Nan Lin is an academic researcher from Harvard University. The author has contributed to research in topics: Medicine & Breast cancer. The author has an hindex of 105, co-authored 687 publications receiving 54545 citations. Previous affiliations of Nan Lin include University of Michigan & Fujian Medical University.


Papers
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Book
Nan Lin1
01 Jan 2001
TL;DR: Theories of capital capture social relations through social relations as discussed by the authors, where resources, hierarchy, networks, and homophily are considered as the structural foundations of social capital, and social capital and status attainment as the rational basis for social change.
Abstract: Part I. Theory and Research: 1. Theories of capital: the historical foundation 2. Social capital: capital captured through social relations 3. Resources, hierarchy, networks, and homophily: the structural foundation 4. Resources, motivations, and interactions: the action foundation 5. The theory and theoretical propositions 6. Social capital and status attainment: a research tradition 7. Inequality in social capital: a research agenda Part II. Conceptual Extensions: 8. Social capital and the emergence of social structure: a theory of rational choice 9. Reputation and social capital: the rational basis for social change 10. Social capital in hierarchical structures 11. Institutions, networks and capital building 12. Cybernetworks and the global village: the rise of social capital Part III. Epilogue: 13. The future of the theory.

4,989 citations

Book ChapterDOI
Nan Lin1
12 Jul 2017
TL;DR: In this paper, a review of social capital as discussed in the literature, identifies controversies and debates, considers some critical issues, and provides conceptual and research strategies for building a theory.
Abstract: This chapter reviews social capital as discussed in the literature, identifies controversies and debates, considers some critical issues, and provides conceptual and research strategies for building a theory. It argues that such a theory and the research enterprise must be based on the fundamental understanding that social capital is captured from embedded resources in social networks. Such measurements can strength of tie network bridge, or intimacy, intensity, interaction and reciprocity be made relative to two frameworks: network resources and contact resources. There are many other measures, such as size, density, cohesion, and closeness of social networks which are candidates as measures for social capital. Network locations are necessary conditions of embedded resources. By considering social capital as assets in networks, the chapter discusses some issues in conceptualization, measurement, and causal mechanism. A proposed model identifies the exogenous factors leading to the acquisition (or the lack) of social capital as well as the expected returns of social capital.

3,733 citations

Journal ArticleDOI
21 Nov 2007-JAMA
TL;DR: The results suggest that the use of a pedometer is associated with significant increases in physical activity and significant decreases in body mass index and blood pressure.
Abstract: ContextWithout detailed evidence of their effectiveness, pedometers have recently become popular as a tool for motivating physical activity.ObjectiveTo evaluate the association of pedometer use with physical activity and health outcomes among outpatient adults.Data SourcesEnglish-language articles from MEDLINE, EMBASE, Sport Discus, PsychINFO, Cochrane Library, Thompson Scientific (formerly known as Thompson ISI), and ERIC (1966-2007); bibliographies of retrieved articles; and conference proceedings.Study SelectionStudies were eligible for inclusion if they reported an assessment of pedometer use among adult outpatients, reported a change in steps per day, and included more than 5 participants.Data Extraction and Data SynthesisTwo investigators independently abstracted data about the intervention; participants; number of steps per day; and presence or absence of obesity, diabetes, hypertension, or hyperlipidemia. Data were pooled using random-effects calculations, and meta-regression was performed.ResultsOur searches identified 2246 citations; 26 studies with a total of 2767 participants met inclusion criteria (8 randomized controlled trials [RCTs] and 18 observational studies). The participants' mean (SD) age was 49 (9) years and 85% were women. The mean intervention duration was 18 weeks. In the RCTs, pedometer users significantly increased their physical activity by 2491 steps per day more than control participants (95% confidence interval [CI], 1098-3885 steps per day, P < .001). Among the observational studies, pedometer users significantly increased their physical activity by 2183 steps per day over baseline (95% CI, 1571-2796 steps per day, P < .0001). Overall, pedometer users increased their physical activity by 26.9% over baseline. An important predictor of increased physical activity was having a step goal such as 10 000 steps per day (P = .001). When data from all studies were combined, pedometer users significantly decreased their body mass index by 0.38 (95% CI, 0.05-0.72; P = .03). This decrease was associated with older age (P = .001) and having a step goal (P = .04). Intervention participants significantly decreased their systolic blood pressure by 3.8 mm Hg (95% CI, 1.7-5.9 mm Hg, P < .001). This decrease was associated with greater baseline systolic blood pressure (P = .009) and change in steps per day (P = .08).ConclusionsThe results suggest that the use of a pedometer is associated with significant increases in physical activity and significant decreases in body mass index and blood pressure. Whether these changes are durable over the long term is undetermined.

2,085 citations

Journal ArticleDOI
Nan Lin1
TL;DR: In this article, the authors trace the development of the research enterprise known as the social resources theory, which formulated and tested a number of propositions concerning the relationships between embedded resources in social networks and socioeconomic attainment.
Abstract: ▪ Abstract This essay traces the development of the research enterprise, known as the social resources theory, which formulated and tested a number of propositions concerning the relationships between embedded resources in social networks and socioeconomic attainment. This enterprise, seen in the light of social capital, has accumulated a substantial body of research literature and supported the proposition that social capital, in terms of both access and mobilization of embedded resources, enhances the chances of attaining better statuses. Further, social capital is contingent on initial positions in the social hierarchies as well as on extensity of social ties. The essay concludes with a discussion of remaining critical issues and future research directions for this research enterprise.

1,843 citations

Journal ArticleDOI
TL;DR: This guideline describes a standard approach to solid tumour measurements and definitions for objective change in tumour size for use in trials in which an immunotherapy is used and defines the minimum datapoints required from future trials to facilitate the compilation of a data warehouse to later validate iRECIST.
Abstract: Tumours respond differently to immunotherapies compared with chemotherapeutic drugs, raising questions about the assessment of changes in tumour burden-a mainstay of evaluation of cancer therapeutics that provides key information about objective response and disease progression. A consensus guideline-iRECIST-was developed by the RECIST working group for the use of modified Response Evaluation Criteria in Solid Tumours (RECIST version 1.1) in cancer immunotherapy trials, to ensure consistent design and data collection, facilitate the ongoing collection of trial data, and ultimate validation of the guideline. This guideline describes a standard approach to solid tumour measurements and definitions for objective change in tumour size for use in trials in which an immunotherapy is used. Additionally, it defines the minimum datapoints required from future trials and those currently in development to facilitate the compilation of a data warehouse to use to later validate iRECIST. An unprecedented number of trials have been done, initiated, or are planned to test new immune modulators for cancer therapy using a variety of modified response criteria. This guideline will allow consistent conduct, interpretation, and analysis of trials of immunotherapies.

1,416 citations


Cited by
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01 Jan 1980
TL;DR: In this article, the context of educational research, planning educational research and the styles of education research are discussed, along with strategies and instruments for data collection and research for data analysis.
Abstract: Part One: The Context Of Educational Research Part Two: Planning Educational Research Part Three: Styles Of Educational Research Part Four: Strategies And Instruments For Data Collection And Researching Part Five: Data Analysis

21,163 citations

Journal ArticleDOI
TL;DR: The homophily principle as mentioned in this paper states that similarity breeds connection, and that people's personal networks are homogeneous with regard to many sociodemographic, behavioral, and intrapersonal characteristics.
Abstract: Similarity breeds connection. This principle—the homophily principle—structures network ties of every type, including marriage, friendship, work, advice, support, information transfer, exchange, comembership, and other types of relationship. The result is that people's personal networks are homogeneous with regard to many sociodemographic, behavioral, and intrapersonal characteristics. Homophily limits people's social worlds in a way that has powerful implications for the information they receive, the attitudes they form, and the interactions they experience. Homophily in race and ethnicity creates the strongest divides in our personal environments, with age, religion, education, occupation, and gender following in roughly that order. Geographic propinquity, families, organizations, and isomorphic positions in social systems all create contexts in which homophilous relations form. Ties between nonsimilar individuals also dissolve at a higher rate, which sets the stage for the formation of niches (localize...

15,738 citations

Journal ArticleDOI
TL;DR: There is evidence consistent with both main effect and main effect models for social support, but each represents a different process through which social support may affect well-being.
Abstract: Examines whether the positive association between social support and well-being is attributable more to an overall beneficial effect of support (main- or direct-effect model) or to a process of support protecting persons from potentially adverse effects of stressful events (buffering model). The review of studies is organized according to (1) whether a measure assesses support structure (the existence of relationships) or function (the extent to which one's interpersonal relationships provide particular resources) and (2) the degree of specificity (vs globality) of the scale. Special attention is given to methodological characteristics that are requisite for a fair comparison of the models. It is concluded that there is evidence consistent with both models. Evidence for the buffering model is found when the social support measure assesses the perceived availability of interpersonal resources that are responsive to the needs elicited by stressful events. Evidence for a main effect model is found when the support measure assesses a person's degree of integration in a large social network. Both conceptualizations of social support are correct in some respects, but each represents a different process through which social support may affect well-being. Implications for theories of social support processes and for the design of preventive interventions are discussed.

14,570 citations

Journal ArticleDOI
TL;DR: Social capital has a definite place in sociological theory as mentioned in this paper, and its role in social control, in family support, and in benefits mediated by extra-familial networks, but excessive extensions of the concept may lead to excessive emphasis on positive consequences of sociability.
Abstract: This paper reviews the origins and definitions of social capital in the writings of Bourdieu, Loury, and Coleman, among other authors. It distinguishes four sources of social capital and examines their dynamics. Applications of the concept in the sociological literature emphasize its role in social control, in family support, and in benefits mediated by extrafamilial networks. I provide examples of each of these positive functions. Negative consequences of the same processes also deserve attention for a balanced picture of the forces at play. I review four such consequences and illustrate them with relevant examples. Recent writings on social capital have extended the concept from an individual asset to a feature of communities and even nations. The final sections describe this conceptual stretch and examine its limitations. I argue that, as shorthand for the positive consequences of sociability, social capital has a definite place in sociological theory. However, excessive extensions of the concept may j...

11,460 citations