共 50 条
- [41] Neurocritical Care Organization in the Low-Income and Middle-Income CountriesNEUROCRITICAL CARE, 2025,Prabhakar, Hemanshu论文数: 0 引用数: 0 h-index: 0机构: All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, India All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaLele, Abhijit V.论文数: 0 引用数: 0 h-index: 0机构: Univ Washington, Harborview Med Ctr, Dept Anesthesiol & Pain Med, Seattle, WA USA All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaKapoor, Indu论文数: 0 引用数: 0 h-index: 0机构: All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, India All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaMahajan, Charu论文数: 0 引用数: 0 h-index: 0机构: All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, India All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaShrestha, Gentle S.论文数: 0 引用数: 0 h-index: 0机构: Tribhuvan Univ, Teaching Hosp, Dept Crit Care Med, Kathmandu, Nepal All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaRao, Chethan Venkatasubba论文数: 0 引用数: 0 h-index: 0机构: Baylor Coll Med, Dept Neurol, Houston, TX USA Baylor Coll Med, Dept Neurosurg, Houston, TX USA Baylor Coll Med, Ctr Space Med, Houston, TX USA All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaSuarez, Jose I.论文数: 0 引用数: 0 h-index: 0机构: Johns Hopkins Univ, Sch Med, Dept Anesthesiol & Crit Care, Div Neurosci Crit Care, Baltimore, MD USA Johns Hopkins Univ, Sch Med, Dept Neurol, Div Neurosci Crit Care, Baltimore, MD USA Johns Hopkins Univ, Sch Med, Dept Neurosurg, Div Neurosci Crit Care, Baltimore, MD USA All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaLivesay, Sarah L.论文数: 0 引用数: 0 h-index: 0机构: Rush Univ, Dept Adult Hlth & Gerontol Nursing, Chicago, IL USA All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaShafiq, Faraz论文数: 0 引用数: 0 h-index: 0机构: Aga Khan Univ, Dept Anaesthesiol, Karachi, Pakistan All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaPopugaev, Konstantin论文数: 0 引用数: 0 h-index: 0机构: Fed Res & Clin Ctr Intens Care Med & Rehabilitol, Moscow, Russia All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaSantosa, Dhania论文数: 0 引用数: 0 h-index: 0机构: Dr Soetomo Gen Acad Hosp, Dept Anesthesiol & Reanimat, Surabaya, Indonesia All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaZada, Obaidullah Naby论文数: 0 引用数: 0 h-index: 0机构: French Med Inst Mothers & Children Kabul, Dept Anaesthesia & Renimat, Kabul, Afghanistan All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaYang, Wanning论文数: 0 引用数: 0 h-index: 0机构: Capital Med Univ, Beijing Tiantan Hosp, Dept Anesthesiol, Beijing, Peoples R China All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaNisha, Hosne Ara论文数: 0 引用数: 0 h-index: 0机构: Sq Hosp Ltd, Dhaka, Bangladesh All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaMijangos-Mendez, Julio C.论文数: 0 引用数: 0 h-index: 0机构: Univ Guadalajara, Univ Ctr Hlth Sci, Dept Med Clin, Guadalajara, Mexico All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaAgaba, Peter Kaahwa论文数: 0 引用数: 0 h-index: 0机构: Mulago Natl Superspecialized Referral Hosp, Dept Anaesthesia & Intens Care, Kampala, Uganda All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaPortilla, Juan Luis Pinedo论文数: 0 引用数: 0 h-index: 0机构: Hosp Almanzor Aguinaga Asenjo, Serv Anat Patol, Chiclayo, Peru All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaTuahir, Yalew Hasen论文数: 0 引用数: 0 h-index: 0机构: Debre Tabor Univ, Debra Tabor, Ethiopia All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaShanmugam, Puvanendiran论文数: 0 引用数: 0 h-index: 0机构: Peradeniya Teaching Hosp, Intens Care Unit, Peradeniya, Sri Lanka All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaArruebarrena, Yanet Pina论文数: 0 引用数: 0 h-index: 0机构: Greater Accra Reg Hosp, Intens Care Unit Dept, Accra, Ghana All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaVidetta, Walter论文数: 0 引用数: 0 h-index: 0机构: Hosp Interzonal Guemes, Dept Intens Care, Buenos Aires, Argentina All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaVasquez-Garcia, Sebastian论文数: 0 引用数: 0 h-index: 0机构: Clin Country, Neurosci & Intens Care Dept, Bogota, Colombia All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaRaheem, M. Samy Abdel论文数: 0 引用数: 0 h-index: 0机构: Asyut Univ Hosp, Dept Anaesthesiol & Intens Care, Asyut, Egypt All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaYimer, Fasika论文数: 0 引用数: 0 h-index: 0机构: Univ Namibia, Sch Med, Dept Human Biol & Translat Med Sci, Hage Geingob Campus, Windhoek, Namibia All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaPadayachy, Llewellyn C.论文数: 0 引用数: 0 h-index: 0机构: Univ Pretoria, Steve Biko Acad Hosp, Dept Clin Epidemiol, ZA-0002 Pretoria, South Africa All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaNaranjo, Luis Silva论文数: 0 引用数: 0 h-index: 0机构: Hosp Gen Docente Ambato, Serv Emergencia, Ambato, Ecuador All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaArriaga, Pedro论文数: 0 引用数: 0 h-index: 0机构: Karl Heusner Mem Hosp, Crit Care, Belize City, Belize All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaMyei, Chann论文数: 0 引用数: 0 h-index: 0机构: Def Serv Gen Hosp, Dept Anaesthesia & Intens Care, Yangon, Myanmar All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaMatuja, Sarah Shali论文数: 0 引用数: 0 h-index: 0机构: Catholic Univ Hlth & Allied Sci, Dept Internal Med, Mwanza, Tanzania All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaFadalla, Tarig论文数: 0 引用数: 0 h-index: 0机构: Soba Univ Hosp, Dept Neurosurg, Khartoum, Sudan All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, India论文数: 引用数: h-index:机构:Lundeg, Ganbold论文数: 0 引用数: 0 h-index: 0机构: Mongolian Natl Univ Med Sci, Dept Crit Care & Anaesthesia, Ulaanbaatar, Mongolia All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaSalisu-Kabara, Halima M.论文数: 0 引用数: 0 h-index: 0机构: Aminu Kano Teaching Hosp, Dept Pathol, Kano, Nigeria All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaTsan, Samuel Ern Hung论文数: 0 引用数: 0 h-index: 0机构: Univ Malaysia, Fac Med & Hlth Sci, Dept Anaesthesiol & Intens Care, Sarawak, Malaysia All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaGutierrez, Simon P.论文数: 0 引用数: 0 h-index: 0机构: Hosp Especialidades Materno Infantile, Intens Care, La Paz, Bolivia All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaYankae, Leroy P.论文数: 0 引用数: 0 h-index: 0机构: UNIV TEACHING HOSP, Dept Neurol, LUSAKA, Zambia All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaKonkayev, Aidos论文数: 0 引用数: 0 h-index: 0机构: Astana Med Univ, Dept Endosurg, Astana, Kazakhstan All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaChaikittisilpa, Nophanan论文数: 0 引用数: 0 h-index: 0机构: Mahidol, Siriraj Hosp, Fac Med, Dept Anesthesiol, Bangkok, Thailand All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaSampaio, Gisele论文数: 0 引用数: 0 h-index: 0机构: Univ Fed Sao Paulo, Dept Neurol, Sao Paulo, Brazil Hosp Israelita Albert Einstein, Sao Paulo, Brazil All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaBui, Tuan Van论文数: 0 引用数: 0 h-index: 0机构: Cho Ray Hosp, Neurosurg Intens Care Unit, Ho Chi Minh City, Vietnam All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaMariano, Geraldine Seina L.论文数: 0 引用数: 0 h-index: 0机构: St Lukes Med Ctr, Inst Urol, Quezon City, Philippines All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaSabillon, Gisselle Aguilar论文数: 0 引用数: 0 h-index: 0机构: Hosp Mario Catarino Rivas, San Pedro Sula, Honduras All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaBlanco, Pablo论文数: 0 引用数: 0 h-index: 0机构: Hosp Univ Dr Luis Razetti, Barcelona, Anzoategui, Venezuela All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaOrtiz, Williams论文数: 0 引用数: 0 h-index: 0机构: Hosp Clin, San Lorenzo, Paraguay All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaGallardo, Angel Jesus Lacerda论文数: 0 引用数: 0 h-index: 0机构: Hosp Gen Docente Roberto Rodriguez Fernandez, Moron, Cuba All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaArun, Oguzhan论文数: 0 引用数: 0 h-index: 0机构: Selcuk Univ, Fac Med, Dept Anesthesiol & Reanimat, Konya, Turkiye All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, IndiaMani, Kalaivani论文数: 0 引用数: 0 h-index: 0机构: All India Inst Med Sci, Dept Biostat, New Delhi, India All India Inst Med Sci, Dept Neuroanaesthesiol & Crit Care, New Delhi, India
- [42] Smoking status and HIV in low-income and middle-income countriesLANCET GLOBAL HEALTH, 2017, 5 (06): : E557 - E558Jaquet, Antoine论文数: 0 引用数: 0 h-index: 0机构: Univ Bordeaux, Inst Sante Publ Epidemiol & Dev, F-33000 Bordeaux, FranceDabis, Francois论文数: 0 引用数: 0 h-index: 0机构: Univ Bordeaux, Inst Sante Publ Epidemiol & Dev, F-33000 Bordeaux, France Univ Bordeaux, Inst Sante Publ Epidemiol & Dev, F-33000 Bordeaux, France
- [43] Anal cancer screening in low-income and middle-income countriesLANCET GASTROENTEROLOGY & HEPATOLOGY, 2021, 6 (07): : 526 - 526Blair, Kevin J.论文数: 0 引用数: 0 h-index: 0机构: Univ Calif Los Angeles, South Amer Program HIV Prevent Res, Los Angeles, CA 90095 USA Univ Calif Los Angeles, Dept Surg, Program Adv Surg Equ, Los Angeles, CA 90095 USA Univ Calif Los Angeles, South Amer Program HIV Prevent Res, Los Angeles, CA 90095 USALiliana Valderrama-Beltran, Sandra论文数: 0 引用数: 0 h-index: 0机构: Hosp Univ San Ignacio, Dept Med Interna, Unidad Infectol, Bogota, Colombia Pontificia Univ Javeriana, Fac Med, Bogota, Colombia Univ Calif Los Angeles, South Amer Program HIV Prevent Res, Los Angeles, CA 90095 USABautista-Arredondo, Sergio论文数: 0 引用数: 0 h-index: 0机构: Natl Inst Publ Hlth, Ctr Hlth Syst Res, Hlth Econ & Hlth Syst Innovat, Cuernavaca, Morelos, Mexico Univ Calif Los Angeles, South Amer Program HIV Prevent Res, Los Angeles, CA 90095 USAJuillard, Catherine论文数: 0 引用数: 0 h-index: 0机构: Univ Calif Los Angeles, Dept Surg, Program Adv Surg Equ, Los Angeles, CA 90095 USA Univ Calif Los Angeles, South Amer Program HIV Prevent Res, Los Angeles, CA 90095 USALombana Amaya, Luis Jorge论文数: 0 引用数: 0 h-index: 0机构: Pontificia Univ Javeriana, Fac Med, Bogota, Colombia Hosp Univ San Ignacio, Dept Cirugia Gen, Unidad Coloproctol, Bogota, Colombia Univ Calif Los Angeles, South Amer Program HIV Prevent Res, Los Angeles, CA 90095 USA
- [44] Epilepsy stigma in children in low-income and middle-income countriesLANCET CHILD & ADOLESCENT HEALTH, 2021, 5 (05): : 314 - 316Kariuki, Symon M.论文数: 0 引用数: 0 h-index: 0机构: KEMRI Wellcome Trust Res Programme, Kilifi 80108, Kenya Pwani Univ, Kilifi, Kenya Univ Oxford, Dept Psychiat, Oxford, England KEMRI Wellcome Trust Res Programme, Kilifi 80108, KenyaThomas, Priya Treesa论文数: 0 引用数: 0 h-index: 0机构: Natl Inst Mental Hlth & Neurosci, Dept Psychiat Social Work, Bangalore, Karnataka, India KEMRI Wellcome Trust Res Programme, Kilifi 80108, KenyaNewton, Charles R. J. C.论文数: 0 引用数: 0 h-index: 0机构: KEMRI Wellcome Trust Res Programme, Kilifi 80108, Kenya Pwani Univ, Kilifi, Kenya Univ Oxford, Dept Psychiat, Oxford, England KEMRI Wellcome Trust Res Programme, Kilifi 80108, Kenya
- [45] Acquired heart disease in low-income and middle-income countriesARCHIVES OF DISEASE IN CHILDHOOD, 2018, 103 (01) : 73 - 77Curry, Chris论文数: 0 引用数: 0 h-index: 0机构: Queens Univ Belfast, Sch Med Dent & Biomed Sci, Ctr Med Educ, Belfast BT12 6BA, Antrim, North Ireland Queens Univ Belfast, Sch Med Dent & Biomed Sci, Ctr Med Educ, Belfast BT12 6BA, Antrim, North IrelandZuhlke, Liesl论文数: 0 引用数: 0 h-index: 0机构: Univ Cape Town, Cardiol, Cape Town, South Africa Queens Univ Belfast, Sch Med Dent & Biomed Sci, Ctr Med Educ, Belfast BT12 6BA, Antrim, North IrelandMocumbi, Ana论文数: 0 引用数: 0 h-index: 0机构: Univ Eduardo Mondlane, Cardiol, Maputo, Mozambique Queens Univ Belfast, Sch Med Dent & Biomed Sci, Ctr Med Educ, Belfast BT12 6BA, Antrim, North Ireland论文数: 引用数: h-index:机构:
- [46] Patient safety challenges in low-income and middle-income countriesCURRENT OPINION IN ANESTHESIOLOGY, 2014, 27 (06) : 623 - 629Steffner, Kirsten R.论文数: 0 引用数: 0 h-index: 0机构: Univ Calif San Francisco, Dept Anesthesia & Perioperat Care, San Francisco, CA 94143 USA Univ Calif San Francisco, Dept Anesthesia & Perioperat Care, San Francisco, CA 94143 USAMcQueen, K. A. Kelly论文数: 0 引用数: 0 h-index: 0机构: Vanderbilt Univ, Med Ctr, Dept Anesthesiol, Vanderbilt Inst Global Hlth, Nashville, TN 37232 USA Univ Calif San Francisco, Dept Anesthesia & Perioperat Care, San Francisco, CA 94143 USAGelb, Adrian W.论文数: 0 引用数: 0 h-index: 0机构: Univ Calif San Francisco, Dept Anesthesia & Perioperat Care, San Francisco, CA 94143 USA Univ Calif San Francisco, Dept Anesthesia & Perioperat Care, San Francisco, CA 94143 USA
- [47] Implications of technology guidelines for low-income and middle-income countriesLANCET DIABETES & ENDOCRINOLOGY, 2023, 11 (03): : 155 - 155Tandon, Gupta Alpesh Goyal Nikhil论文数: 0 引用数: 0 h-index: 0机构: Metab India Inst Med Sci, Dept Endocrinol, New Delhi 110029, India Metab India Inst Med Sci, Dept Endocrinol, New Delhi 110029, India
- [48] Tackling antimicrobial resistance in low-income and middle-income countriesBMJ GLOBAL HEALTH, 2019, 4 (06):Pokharel, Sunil论文数: 0 引用数: 0 h-index: 0机构: Ctr Trop Med & Global Hlth, Nuffield Dept Clin Med, Oxford, England Ctr Trop Med & Global Hlth, Nuffield Dept Clin Med, Oxford, EnglandRaut, Shristi论文数: 0 引用数: 0 h-index: 0机构: Univ Coll Med Sci, Dept Microbiol, Bhairahawa, Nepal Ctr Trop Med & Global Hlth, Nuffield Dept Clin Med, Oxford, EnglandAdhikari, Bipin论文数: 0 引用数: 0 h-index: 0机构: Ctr Trop Med & Global Hlth, Nuffield Dept Clin Med, Oxford, England Ctr Trop Med & Global Hlth, Nuffield Dept Clin Med, Oxford, England
- [49] Pathology and laboratory medicine in low-income and middle-income countries 2: Improving pathology and laboratory medicine in low-income and middle-income countries: roadmap to solutionsLANCET, 2018, 391 (10133): : 1939 - 1952论文数: 引用数: h-index:机构:Cherniak, William论文数: 0 引用数: 0 h-index: 0机构: NCI, Ctr Global Hlth, NIH, Bethesda, MD 20892 USA Aga Khan Univ Hosp, Dept Pathol, Nairobi 00100, KenyaLawler, Mark论文数: 0 引用数: 0 h-index: 0机构: Queens Univ, Fac Med Hlth & Life Sci, Belfast, Antrim, North Ireland Queens Univ, Ctr Canc Res & Cell Biol, Belfast, Antrim, North Ireland Aga Khan Univ Hosp, Dept Pathol, Nairobi 00100, KenyaTan, Soo Yong论文数: 0 引用数: 0 h-index: 0机构: Natl Univ Singapore, Dept Pathol, Natl Univ Hosp, Singapore, Singapore Aga Khan Univ Hosp, Dept Pathol, Nairobi 00100, KenyaEl Sadr, Wafaa论文数: 0 引用数: 0 h-index: 0机构: Columbia Univ, ICAP, Mailman Sch Publ Hlth, New York, NY USA Aga Khan Univ Hosp, Dept Pathol, Nairobi 00100, KenyaWolf, Nicholas论文数: 0 引用数: 0 h-index: 0机构: NCI, Ctr Global Hlth, NIH, Bethesda, MD 20892 USA Aga Khan Univ Hosp, Dept Pathol, Nairobi 00100, KenyaSilkensen, Shannon论文数: 0 引用数: 0 h-index: 0机构: NCI, Ctr Global Hlth, NIH, Bethesda, MD 20892 USA Aga Khan Univ Hosp, Dept Pathol, Nairobi 00100, KenyaBrand, Nathan论文数: 0 引用数: 0 h-index: 0机构: Columbia Univ, Vagelos Coll Phys & Surg, New York, NY USA Aga Khan Univ Hosp, Dept Pathol, Nairobi 00100, Kenya论文数: 引用数: h-index:机构:Pai, Sanjay A.论文数: 0 引用数: 0 h-index: 0机构: Columbia Asia Referral Hosp, Bangalore, Karnataka, India Aga Khan Univ Hosp, Dept Pathol, Nairobi 00100, KenyaWilson, Michael L.论文数: 0 引用数: 0 h-index: 0机构: Denver Hlth, Dept Pathol & Lab Serv, Denver, CO USA Univ Colorado, Dept Pathol, Sch Med, Aurora, CO USA Aga Khan Univ Hosp, Dept Pathol, Nairobi 00100, KenyaMilner, Danny论文数: 0 引用数: 0 h-index: 0机构: Amer Soc Clin Pathologists, Chicago, IL USA Aga Khan Univ Hosp, Dept Pathol, Nairobi 00100, KenyaFlanigan, John论文数: 0 引用数: 0 h-index: 0机构: NCI, Ctr Global Hlth, NIH, Bethesda, MD 20892 USA Aga Khan Univ Hosp, Dept Pathol, Nairobi 00100, KenyaFleming, Kenneth A.论文数: 0 引用数: 0 h-index: 0机构: NCI, Ctr Global Hlth, NIH, Bethesda, MD 20892 USA Univ Oxford, Green Templeton Coll, Oxford, England Aga Khan Univ Hosp, Dept Pathol, Nairobi 00100, Kenya
- [50] Overcoming the Middle-Income ChallengeEMERGING MARKETS FINANCE AND TRADE, 2018, 54 (06) : 1205 - 1207Aizenman, Joshua论文数: 0 引用数: 0 h-index: 0机构: Univ Southern Calif, Dept Econ, Los Angeles, CA USA Univ Southern Calif, Dept Econ, Los Angeles, CA USAEichengreen, Barry论文数: 0 引用数: 0 h-index: 0机构: Univ Calif Berkeley, Dept Econ, Berkeley, CA 94720 USA Univ Southern Calif, Dept Econ, Los Angeles, CA USAPark, Donghyun论文数: 0 引用数: 0 h-index: 0机构: Asian Dev Bank, Econ Res & Reg Cooperat Dept, Mandaluyong, Metro Manila, Philippines Univ Southern Calif, Dept Econ, Los Angeles, CA USA