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Political influence by a professional association, like the influence of any special interest group, is a collective good for the members of the profession. This paper investigates the variables affecting the ability of state optometric associations to overcome the free rider problem and induce optometrists to join the association. Although the empirical results show little evidence that organization costs are reduced by concentration in urban areas, the results do strongly support the hypothesis that there will be less free riding in smaller groups. The results also support the hypothesis that selective incentives enable latent groups to overcome the free rider problem. By providing continuing education at reduced fees to members of the association, optometric associations have increased the percentage of optometrists who are association members in those states with statutory continuing education requirements.  相似文献   
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In principle, reporting by state and local governments to thefederal government is essential to the design and implementationof national policy. In practice, reporting often engenders resentmentof federal intrusion and is often dismissed as a waste of stateand local resources. Is reporting useless? Does it strengthenthe federal government at the expense of state and local governments?We asked federal, state, local, and site officials about thevalue and burden of five specific reporting systems in elementaryand secondary education. Common assumptions about reportingdid not correspond to respondent reactions. Both value and burdencascade through the intergovernmental system, reaching policymakersin all governments. Although critics seldom discriminate betweentypes of reporting, we found that reporting designed to improvecompliance with federal standards evoked different judgmentsof value and burden than reporting designed for assistance.These results suggest some new approaches to federal policygoverning the collection of information and to the design ofindividual reporting systems.  相似文献   
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AN INTRODUCTION TO ISLAM. By GERHARD ENDRESS. Translated by CAROLE HILLENBRAND. Edinburgh, Edinburgh University Press, 1988. ix + 293pp. H/B £29.95, P/B £9.50.

A HISTORY OF ISLAMIC SOCIETIES. By IRA M. LAPIDUS. Cambridge, Cambridge University Press, 1988. 1002pp. £35.00.

THE GREAT POWERS AND THE MIDDLE EAST 1919–1939. Edited by URIEL DANN. (Collected Papers Series of the Dayan Centre for Middle Eastern and African Studies, Tel Aviv University.) New York and London, Holmes and Meier Publishers, Inc., Africana Publishing Company, 1988. 434pp. $59.50 cloth.

THE RENTIER STATE. Edited by HAZEM BEBLAWI and GIACOMO LUCIANI. London, Croom Helm for Istituto Affari Internazionali, Rome, 1987. 240pp.

DEVELOPMENT, ADMINISTRATION AND AID IN THE MIDDLE EAST. By GERD NONNEMAN. London and New York, Routledge, 1988. 203pp. Figures, tables. £25.00.

DOMESTIC POLITICS AND REGIONAL SECURITY: JORDAN, SYRIA AND ISRAEL. THE END OF AN ERA? By VALERIE YORKE. Aldershot, Brookfield ISA, Hong Kong, Singapore, Sydney, Gower. 1988. Published for the International Institute for Strategic Studies. 432pp. £35.00

THE BIRTH OF THE PALESTINIAN REFUGEE PROBLEM. By B. MORRIS. Cambridge, Cambridge U.P., 1988. 400pp. £30.00.

ETHNIZITÄT UND MACHTKONKURRENZ IN INTER‐ARABISCHEN BEZIEHUNGEN: DER SYRISCH‐IRAKISCHE KONFLIKT UNTER DEN BA'ATH‐REGIMEN. By EBERHARD KIENLE. Berlin, Verlag Das Arabische Buch, 1988. 63pp.

THE SHATT‐AL‐ARAB BOUNDARY QUESTION: A LEGAL REAPPRAISAL. By KAIYIN HOMA KAIKOBAD. Oxford, Clarendon Press, 1988. xix, 142pp. 10 maps and figures, table of legal cases. £25.00.

IRAN AND IRAQ AT WAR. By S. CHUBIN and C. TRIPP. London, I.B. Tauris, 1988. 328pp. £19.50.

THE ARAB GULF AND THE ARAB WORLD. Edited by BRIAN R. PRIDHAM. London, Croom Helm, 1988. xv, 302pp. £35.00.

THE GULF COOPERATION COUNCIL: RECORD AND ANALYSIS. By R.K. RAMAZANI. Charlottesville, University Press of Virginia, 1988. 256pp. $45.00.

SAUDI ARABIA IN THE OIL ERA—REGIME AND ELITES: CONFLICT AND COLLABORATION. By MORDECHAI ABIR. London, Croom Helm, 1988. xix, 247pp. £25.00.

THE IMAMATE TRADITION OF OMAN. By J.C. WILKINSON. Cambridge, Cambridge University Press, 1987. xii, 415pp. £40.00.

MUSADDIQ, IRANIAN NATIONALISM AND OIL. Edited by JAMES A. BILL and ROGER LOUIS. Austin, University of Texas Press & London, Tauris, 1988. 358pp.

STATE, DEMOCRACY AND THE MILITARY: TURKEY IN THE 1980s. Edited by METIN HEPER and AHMET EVIN. Berlin and New York, Walter de Gruyter, 1988. 265pp.

WHAT IS TO BE DONE: THE ENLIGHTENED THINKERS AND AN ISLAMIC RENAISSANCE. By ALI SHARI'ATI. Edited and annotated by FARHANG RAJAEE; Foreword by JOHN L. ESPOSITO. Houston, Texas, Institute for Research and Islamic Studies, 1986. xix, 181pp. $25.95 (hardback), $11.95 (paperback).

THE QUR'AN IN ISLAM: ITS IMPACT AND INFLUENCE ON THE LIFE OF MUSLIMS. By ‘ALLAMAH SAYYID M.H. TABATABA'I. Translated by ASSADULLAH AD‐DHAAKIR YATE; Foreword by SEYYED HOSSEIN NASR. London and Blanco, Texas, Zahra Publications, 1987. 118pp. $14.95.

ISLAMIC SPIRITUALITY: 1. FOUNDATIONS. Edited by SEYYED HOSSEIN NASR. (World Spirituality; an Encyclopedic History of the Religious Quest, vol. 19.) London, Routledge and Kegan Paul, 1987. xxix, 450pp. 35 monochrome illustrations. £39.50.

THE MANTLE OF THE PROPHET: RELIGION AND POLITICS IN IRAN. By ROY MOTTAHEDEH. Harmondsworth, Middlesex, Peregrine Books, 1987. 418pp. £6.95.

EL PALACIO OMEYA DE AMMAN I. LA ARQUITECTURA. By ANTONIO ALMAGRO GORBEA. Madrid, Instituto Hispano‐Arabe de Cultura, 1983. 207pp., including an English and an Arabic summary (30pp., unnumbered), 63 plates, 52 figures, 39 loose‐leaf drawings.  相似文献   

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The decline in sports participation that begins in early adolescence has been well documented, and there has been considerable controversy regarding the reasons for this attrition. The present study addressed the attrition process by focusing on the subjective experience of sports as a function of grade, gender, and sport context. Following the procedures of the Experience Sampling Method, 401 5th–9th-grade boys and girls carried electronic pagers, similar to those worn by doctors, for one week, and filled out self-report forms on their activities and subjective states in response to signals received at random times. Older respondents spent less time in sports than their younger peers. This age difference was due primarily to a decline in informal sports participation, with less pronounced attrition from organized sports. Our findings suggest that the reasons for attrition from sport may be context specific. While informal sports were experienced more positively than gym class or organized sports, perceptions of skill were lowest during informal sports and declined with age. It seems youngsters stop participating in organized sports because these activities are less enjoyable to them, while attrition from informal sports is more performance based. Boys spent more time in sports than girls, and this difference was based primarily upon significant gender differences in informal sports participation. In spite of their differential rates of participation, boys and girls reported similar levels of affect, arousal, and skill during sports.This research was supported by NIMH grant number MH38324, Stress in Daily Life During Early Adolescence, awarded to Reed Larson, and was carried out while the first author was a Dissertation Fellow in the Department of Psychology at Loyola University of Chicago.Received Ph.D. in psychology from Loyola University of Chicago. Current research interests include athletic, involvement during early adolescence, body image, and adolescent mental health.Current research interests are stress and coping during early adolescence, and the adaptive use of leisure time.Received Ph.D. from the Committee on Human Development at the University of Chicago. Current research interests include pubertal development, the precursors of eating disorders, and the effects of maternal employment of young adolescents.  相似文献   
330.
Classwork and homework in early adolescence: The ecology of achievement   总被引:1,自引:0,他引:1  
Recent studies have questioned whether the nation's educational system is adequately preparing children to function productively in today's society. To examine this issue, the present study utilized the Experience Sampling Method to investigate the amount of time young adolescents spent doing classwork and homework, their inner subjective experience while doing so, and their companions while doing homework. The relationship between these variables and students' academic performance was also examined. Results revealed that students spent only 15.5 hours per week engaged in school work and only 6 hours per week doing homework, with increased homework time associated with better academic achievement. In addition, students were found to complete homework primarily alone or in classes, although doing homework with their parents was associated with better academic performance. Lastly, students' affect was found to be relatively neutral when doing classwork, but comparatively more negative while doing homework, particularly when doing homework alone. The implications of these findings for understanding the socializing influence of school are discussed.This research was supported by NIMH grant number MH38324, Stress in Daily Life During Early Adolescence, awarded to Reed Larson. This paper was prepared while the first author was a Schmitt Dissertation Fellow at Loyola University of Chicago.Received her Ph.D. from Loyola University of Chicago, Current Research interest are familial and intrapsychic influences on adolescents' academic performance.Current Research interests are pubertal development, precursors of eating disorders, and the effect of maternal employment on young adolescents.  相似文献   
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