Economic Institution Rankings at IDEAS

This file is part of IDEAS, which uses RePEc data

Top 5% Economic Institutions, as of September 2008

Number of Works

Only authors registered with the RePEc Author Service are considered.
Only works listed on RePEc and claimed as theirs by registered authors are counted.
Authors are attributed equally and fully to each institution they claimed to be affiliated with.
Only institutions listed in EDIRC are counted.
Authors affiliated with subentities of institutions listed in EDIRC are also counted in the latter.
Subentities of ranked institutions do not increment the rank count and have their rank listed in parentheses

This ranking is based on 3917 institutions with 17707 registered authors.

Same ranking by individual authors or countries and states. All institution rankings. More rankings.

The data presented here is experimental. It is based on a limited sample of the research output in Economics and Finance. Only material catalogued in RePEc is considered. For any citation based criterion, only works that could be parsed by the CitEc project are considered. For any ranking of people, only those registered with the RePEc Author Service can be taken into account. And for rankings of institutions, only those listed in EDIRC and claimed as affiliation by the respective, registered authors can be measured. Thus, this list is by no means based on a complete sample. You can help making this more comprehensive by encouraging more publications to be listed (instructions) and more authors to register (form). For more details on the various rankings that are available as well for documentation, follow this link.

Rank	Institution	Location	Score	Authors
1	National Bureau of Economic Research (NBER)	Cambridge, Massachusetts (USA)	23130	321
2	Institute for the Study of Labor (IZA)	Bonn, Germany	18527	414
3	Centre for Economic Policy Research (CEPR)	London, United Kingdom	17673	260
4	CESifo	München, Germany	6406	104
5	World Bank Group	Washington, District of Columbia (USA)	5385	191
6	London School of Economics (LSE), University of London	London, United Kingdom	4433	135
7	Department of Economics, Harvard University	Cambridge, Massachusetts (USA)	4114	44
8	International Monetary Fund (IMF)	Washington, District of Columbia (USA)	4034	162
9	Department of Economics, Oxford University	Oxford, United Kingdom	3684	119
(9)	Economics Research, World Bank Group	Washington, District of Columbia (USA)	3664	101
10	Tinbergen Instituut	Amsterdam, Netherlands	3545	57
11	DIW Berlin (Deutsches Institut für Wirtschaftsforschung)	Berlin, Germany	3460	112
12	Rimini Center for Economic Analysis (RCEA)	Rimini, Italy	3350	91
13	Department of Economics, Princeton University	Princeton, New Jersey (USA)	3242	40
14	Department of Economics, Iowa State University	Ames, Iowa (USA)	3200	36
15	Faculteit der Economische Wetenschappen en Bedrijfskunde, Vrije Universiteit	Amsterdam, Netherlands	3184	54
16	ECORE	Louvain/Bruxelles, Belgium	2995	86
17	Department of Economics, University of California-Berkeley	Berkeley, California (USA)	2928	36
18	CentER for Economic Research, Universiteit van Tilburg (Katholieke Universiteit Brabant)	Tilburg, Netherlands	2874	97
19	Department of Economics, University of Warwick	Coventry, United Kingdom	2710	62
20	Department of Economics, School of Arts and Sciences, Columbia University	New York City, New York (USA)	2504	39
21	Department of Economics, New York University	New York City, New York (USA)	2428	42
22	Toulouse School of Economics (TSE)	Toulouse, France	2390	78
23	Kennedy School of Government, Harvard University	Cambridge, Massachusetts (USA)	2290	40
24	Paris-Jourdan Sciences Économiques (PSE), École Normale Supérieure	Paris, France	2257	58
25	Economics Department, Massachusetts Institute of Technology (MIT)	Cambridge, Massachusetts (USA)	2143	28
26	Wharton School, University of Pennsylvania	Philadelphia, Pennsylvania (USA)	2138	47
(26)	Center for Operations Research and Econometrics (CORE), ECORE	Louvain-la-Neuve, Belgium	2073	54
27	Federal Reserve Bank of St. Louis	St. Louis, Missouri (USA)	2070	34
28	Institute for Fiscal Studies (IFS)	London, United Kingdom	2067	42
29	Faculteit Economie en Bedrijfskunde, Universiteit van Amsterdam	Amsterdam, Netherlands	2056	69
(29)	Economic Research, Federal Reserve Bank of St. Louis	St. Louis, Missouri (USA)	2000	31
30	Department of Economics, University College London (UCL), University of London	London, United Kingdom	1982	42
31	Paris School of Economics	Paris, France	1936	78
32	Centre d'Économie de la Sorbonne, Université Panthéon-Sorbonne (Paris I)	Paris, France	1928	104
33	Department of Economics, University of Pennsylvania	Philadelphia, Pennsylvania (USA)	1890	34
34	Cowles Foundation for Research in Economics, Yale University	New Haven, Connecticut (USA)	1865	18
(34)	Centre for Economic Performance (CEP), London School of Economics (LSE), University of London	London, United Kingdom	1841	40
35	Economics Department, Yale University	New Haven, Connecticut (USA)	1806	30
36	Faculteit der Economische Wetenschappen, Erasmus Universiteit	Rotterdam, Netherlands	1787	63
37	Graduate School of Business, Columbia University	New York City, New York (USA)	1745	37
38	Economics Department, Queen's University	Kingston, Canada	1743	49
39	European Central Bank	Frankfurt am Main, Germany	1742	88
40	Federal Reserve Bank of New York	New York City, New York (USA)	1737	62
41	Department of Economics, University of California-Los Angeles (UCLA)	Los Angeles, California (USA)	1715	37
42	Federal Reserve Bank of San Francisco	San Francisco, California (USA)	1685	28
43	Faculty of Economics and Commerce, University of Melbourne	Melbourne, Australia	1659	52
44	Faculteit der Economische Wetenschappen en Bedrijfskunde, Universiteit Maastricht	Maastricht, Netherlands	1640	52
45	Federal Reserve Board (Board of Governors of the Federal Reserve System)	Washington, District of Columbia (USA)	1639	63
(45)	Research and Statistics Group, Federal Reserve Bank of New York	New York City, New York (USA)	1624	58
46	Department of Economics, University of Chicago	Chicago, Illinois (USA)	1608	28
47	Department of Economics, Boston University	Boston, Massachusetts (USA)	1604	42
48	Department of Economics, University of Toronto	Toronto, Canada	1601	53
(48)	Institut d'Économie Industrielle (IDEI), Toulouse School of Economics (TSE)	Toulouse, France	1599	24
49	Centre for Household, Income, Labour and Demographic Economics (CHILD)	Torino, Italy	1594	52
50	Faculty of Economics, University of Cambridge	Cambridge, United Kingdom	1564	42
51	Centre for Applied Macroeconomic Analysis (CAMA)		1559	40
52	Max-Planck-Institut für Ökonomik, Max-Planck-Gesellschaft	Jena, Germany	1548	55
53	Graduate School of Business, University of Chicago	Chicago, Illinois (USA)	1538	38
54	Center for Agricultural and Rural Development (CARD), Iowa State University	Ames, Iowa (USA)	1526	12
(54)	Afdeling Ruimtelijke Economie, Faculteit der Economische Wetenschappen en Bedrijfskunde, Vrije Universiteit	Amsterdam, Netherlands	1523	17
55	Department of Economics, University of California-San Diego (UCSD)	La Jolla, California (USA)	1507	34
56	Stern School of Business, New York University	New York City, New York (USA)	1505	33
56	Organisation de Coopération et de Développement Économiques (OCDE)	Paris, France	1505	94
(57)	Economics Department, London School of Economics (LSE), University of London	London, United Kingdom	1495	44
58	Federal Reserve Bank of Minneapolis	Minneapolis, Minnesota (USA)	1460	21
59	Department of Economics, European University Institute	Firenze, Italy	1455	43
60	Department of Economics, Boston College	Chestnut Hill, Massachusetts (USA)	1450	31
61	Departamento de Economía, Universidad Carlos III de Madrid	Madrid, Spain	1428	72
(61)	Department of Economics, Faculty of Economics and Commerce, University of Melbourne	Melbourne, Australia	1411	38
62	Department of Economics, Stanford University	Palo Alto, California (USA)	1403	32
63	Centre Interuniversitaire de Recherche en Analyse des Organisations (CIRANO)	Montréal, Canada	1393	30
64	Faculteit der Economische Wetenschappen, Universiteit van Tilburg (Katholieke Universiteit Brabant)	Tilburg, Netherlands	1370	53
65	Faculty of Business and Economics, Monash University	Clayton, Australia	1361	53
(65)	Economic Research, Federal Reserve Bank of San Francisco	San Francisco, California (USA)	1348	23
66	Wirtschaftswissenschaftliche Fakutät, Universität Zürich	Zürich, Switzerland	1347	38
67	School of Economics, University of Nottingham	Nottingham, United Kingdom	1342	40
68	Department of Economics, Northwestern University	Evanston, Illinois (USA)	1321	26
69	Institut National de la Statistique et des Études Économiques (INSEE), Government of France	Paris, France	1319	36
(69)	Centre de Recherche en Économie et Statistique (CREST), Institut National de la Statistique et des Études Économiques (INSEE), Government of France	Paris, France	1310	35
(69)	Finance & Economics Department, Graduate School of Business, Columbia University	New York City, New York (USA)	1295	21
70	Geary Institute, University College Dublin	Dublin, Ireland	1284	20
71	United Nations University-Maastricht Economic Research Institute of Innovation and Technology (UNU-MERIT)	Maastricht, Netherlands	1279	43
72	Department of Economics, Vanderbilt University	Nashville, Tennessee (USA)	1275	22
73	William Davidson Institute, University of Michigan	Ann Arbor, Michigan (USA)	1265	23
74	Economics Department, University of Wisconsin-Madison	Madison, Wisconsin (USA)	1254	22
75	Department of Economics, Duke University	Durham, North Carolina (USA)	1246	32
76	Innocenzo Gasparini Institute for Economic Research (IGIER), Università Commerciale Luigi Bocconi	Milano, Italy	1226	30
77	Volkswirtschaftliche Fakultät, Ludwig-Maximilians-Universität	München, Germany	1210	26
77	Dipartimento di Scienze Economiche, Alma Mater Studiorum - Università di Bologna	Bologna, Italy	1210	53
79	Facoltà di Economia, Università degli Studi di Roma "Tor Vergata"	Roma, Italy	1209	52
80	Groupement de Recherche en Économie Quantitative d'Aix-Marseille (GREQAM)	Marseille, France	1207	36
81	Wirtschaftswissenschaftliche Fakultät, Humboldt-Universität	Berlin, Germany	1205	68
82	Kellogg Graduate School of Management, Northwestern University	Evanston, Illinois (USA)	1192	36
83	Economics Department, University of Michigan	Ann Arbor, Michigan (USA)	1174	34
84	Economics Department, Brown University	Providence, Rhode Island (USA)	1173	32
85	Walter A. Haas School of Business, University of California-Berkeley	Berkeley, California (USA)	1161	19
86	Österreichisches Institut für Wirtschaftsforschung (WIFO)	Wien, Austria	1150	31
87	Department of Economics and Related Studies, University of York	York, United Kingdom	1147	27
88	Department of Economics, University of British Columbia	Vancouver, Canada	1126	26
89	Faculteit Economie en Bedrijfskunde, Rijksuniversiteit Groningen	Groningen, Netherlands	1125	35
90	Department of Economics, University of Minnesota	Minneapolis, Minnesota (USA)	1123	21
91	Department of Economics, Hebrew University of Jerusalem	Jerusalem, Israel	1121	25
92	Departament d'Economia i Empresa, Universitat Pompeu Fabra	Barcelona, Spain	1119	42
(92)	Vakgroep Algemene Economie, Faculteit der Economische Wetenschappen en Bedrijfskunde, Universiteit Maastricht	Maastricht, Netherlands	1117	30
93	Economics Program, Research School of Social Sciences (RSSS), Australian National University	Canberra, Australia	1104	30
94	Economics Department, University of California-Santa Cruz (UCSC)	Santa Cruz, California (USA)	1099	14
(94)	Research Department, International Monetary Fund (IMF)	Washington, District of Columbia (USA)	1081	31
94	Faculteit Economie en Bedrijfswetenschappen, Katholieke Universiteit Leuven	Leuven, Belgium	1081	64
96	Department of Economics, University of Connecticut	Storrs, Connecticut (USA)	1076	50
96	Economics Department, University of California-Davis	Davis, California (USA)	1076	26
98	Département de Sciences Économiques, Université de Montréal	Montréal, Canada	1068	17
99	Harvard Business School, Harvard University	Cambridge, Massachusetts (USA)	1066	27
100	Institutet för Näringslivsforskning (IFN)	Stockholm, Sweden	1039	30
101	Centre Interuniversitaire de Recherche en Économie Quantitative (CIREQ)	Montréal, Canada	1038	20
102	Economics Department, Michigan State University	East Lansing, Michigan (USA)	1035	36
103	Collegio Carlo Alberto	Moncalieri, Italy	1020	49
(103)	European Centre for Advanced Research in Economics and Statistics (ECARES), ECORE	Bruxelles, Belgium	1019	34
104	Department of Economics, Washington University	St. Louis, Missouri (USA)	1015	19
104	Department of Economics, University of Maryland	College Park, Maryland (USA)	1015	29
106	Volkswirtschaftliche Abteilung, Universität St. Gallen	Sankt Gallen, Switzerland	1008	32
107	School of Economics, University of Queensland	Brisbane, Australia	997	38
108	School of Management, Yale University	New Haven, Connecticut (USA)	994	16
109	Hoover Institution on War Revolution & Peace, Stanford University	Palo Alto, California (USA)	974	13
110	Eitan Berglas School of Economics, Tel Aviv University	Tel Aviv, Israel	969	13
111	Department of Economics, McGill University	Montréal, Canada	940	27
112	Nationalekonomiska Institutionen, Uppsala Universitet	Uppsala, Sweden	939	43
113	Department of Economics, McMaster University	Hamilton, Canada	938	30
114	Banco de la Republica de Colombia	Bogotá, Colombia	910	45
115	Handelshögskolan i Stockholm	Stockholm, Sweden	904	36
116	Department of Economics, University of Glasgow	Glasgow, United Kingdom	902	30
116	Resources for the Future (RFF)	Washington, District of Columbia (USA)	902	25
118	Department of Agricultural and Resource Economics, University of California-Berkeley	Berkeley, California (USA)	901	22
119	International Food Policy Research Institute (IFPRI), Consultative Group on International Agricultural Research (CGIAR)	Washington, District of Columbia (USA)	899	38
120	Economic and Social Research Institute (ESRI)	Dublin, Ireland	890	24
(120)	Institut für Empirische Wirtschaftsforschung, Wirtschaftswissenschaftliche Fakutät, Universität Zürich	Zürich, Switzerland	887	14
121	School of International and Public Affairs (SIPA), Columbia University	New York City, New York (USA)	876	14
122	Faculté des sciences économiques, sociales et politiques (ESPO), Université Catholique de Louvain	Louvain-la-Neuve, Belgium	871	39
123	Wirtschaftswissenschaftlicher Fachbereich, Rheinische Friedrich-Wilhelms-Universität	Bonn, Germany	867	30
124	Fundación de Estudios de Economía Aplicada (FEDEA)	Madrid, Spain	855	24
125	Department of Economics, University of California-Irvine	Irvine, California (USA)	848	18
126	Brookings Institution	Washington, District of Columbia (USA)	832	16
126	Department of Economics, University of California-Santa Barbara (UCSB)	Santa Barbara, California (USA)	832	13
(127)	Sonderforschungsbereich 649: Ökonomisches Risiko, Wirtschaftswissenschaftliche Fakultät, Humboldt-Universität	Berlin, Germany	827	43
128	School of Economics, University College Dublin	Dublin, Ireland	823	22
129	Department of Economics, University of Western Ontario	London, Canada	822	30
130	Cardiff Business School, Cardiff University	Cardiff, United Kingdom	821	29
131	Sloan School of Management, Massachusetts Institute of Technology (MIT)	Cambridge, Massachusetts (USA)	817	18
(131)	Finance Department, Wharton School, University of Pennsylvania	Philadelphia, Pennsylvania (USA)	801	19
(131)	Economics Department, Stern School of Business, New York University	New York City, New York (USA)	797	14
132	RAND	Santa Monica, California (USA)	791	20
133	Institute for Social and Economic Research (ISER), University of Essex	Colchester, United Kingdom	790	28
134	Department of Economics, University of Southern California	Los Angeles, California (USA)	787	12
135	School of Finance and Economics, University of Technology	Sydney, Australia	783	37
(135)	Research Department, Federal Reserve Bank of Minneapolis	Minneapolis, Minnesota (USA)	781	13
(135)	Längschnittstudie Sozio-oekonomisches Panel (SOEP), DIW Berlin (Deutsches Institut für Wirtschaftsforschung)	Berlin, Germany	778	26
136	International Economics Section, The Graduate Institute of International and Development Studies	Genève, Switzerland	776	22
136	Sveriges Riksbank	Stockholm, Sweden	776	24
138	Department of Economics, University of Washington	Seattle, Washington (USA)	772	13
139	Dipartimento di Scienze Economiche, Aziendali e Statistiche, Università degli Studi di Milano	Milano, Italy	763	60
140	Economics, University of Manchester	Manchester, United Kingdom	759	24
141	Department of Economics, Royal Holloway, University of London	Egham, United Kingdom	754	27
(141)	Economics Group, Nuffield College, Department of Economics, Oxford University	Oxford, United Kingdom	748	24
142	Økonomisk institutt, Universitetet i Oslo	Oslo, Norway	747	19
(142)	Centre for the Study of African Economies (CSAE), Department of Economics, Oxford University	Oxford, United Kingdom	745	23
143	Department of Economics, Rutgers University-New Brunswick	New Brunswick, New Jersey (USA)	737	15
144	Département d'Économique, Université Laval	Québec, Canada	730	19
145	Centro Studi di Economia e Finanza (CSEF)	Fisciano, Italy	726	29
146	Economics Department, University of Essex	Colchester, United Kingdom	717	25
147	Institut für Weltwirtschaft (IfW)	Kiel, Germany	713	23
147	Center for Research in Economics, Management and the Arts (CREMA)	Basel/Zürich, Switzerland	713	7
149	Tepper School of Business Administration, Carnegie Mellon University	Pittsburgh, Pennsylvania (USA)	712	15
(149)	Centrum voor Economische Studiën, Faculteit Economie en Bedrijfswetenschappen, Katholieke Universiteit Leuven	Leuven, Belgium	710	33
(149)	Institut de Recherche Économique et Sociale (IRES), Faculté des sciences économiques, sociales et politiques (ESPO), Université Catholique de Louvain	Louvain-la-Neuve, Belgium	706	31
149	Department of Economics, University of Calgary	Calgary, Canada	706	28
151	Centre Interuniversitaire sur le Risque, les Politiques Économiques et l'Emploi (CIRPÉE)	Montréal/Québec, Canada	701	20
152	Facultat d'Económiques, Universitat de Barcelona	Barcelona, Spain	699	43
153	Federal Reserve Bank of Philadelphia	Philadelphia, Pennsylvania (USA)	698	14
(153)	Groupe de Recherche en Économie Mathématique et Quantitative (GREMAQ), Toulouse School of Economics (TSE)	Toulouse, France	694	35
154	Economics Department, Georgetown University	Washington, District of Columbia (USA)	692	23
154	Institut für Volkswirtschaftslehre, Johannes-Kepler-Universität	Linz, Austria	692	22
156	Australian School of Business, University of New South Wales	Sydney, Australia	683	34
(156)	Econometrisch Instituut, Faculteit der Economische Wetenschappen, Erasmus Universiteit	Rotterdam, Netherlands	677	19
157	SOM Research School, Rijksuniversiteit Groningen	Groningen, Netherlands	670	21
158	Théorie Économique, Modélisation, Application (THEMA), Université de Cergy-Pontoise	Cergy-Pontoise, France	669	32
159	Handelshøjskolen i Århus	Aarhus, Denmark	666	32
160	Faculty of Economics, University of Tokyo	Tokyo, Japan	664	17
161	Department of Economics, Leicester University	Leicester, United Kingdom	662	28
162	Federal Reserve Bank of Chicago	Chicago, Illinois (USA)	659	16
163	Department of Economics, Simon Fraser University	Burnaby, Canada	658	29
164	Økonomisk Institut, Københavns Universitet	København, Denmark	654	26
164	Banca d'Italia	Roma, Italy	654	64
166	Bank of England	London, United Kingdom	653	33
167	School of Economics, Finance and Management, University of Bristol	Bristol, United Kingdom	647	17
168	Department of Economics, Cornell University	Ithaca, New York (USA)	645	22
(168)	Maastricht research school of Economics of TEchnology and ORganizations (METEOR), Faculteit der Economische Wetenschappen en Bedrijfskunde, Universiteit Maastricht	Maastricht, Netherlands	645	20
169	Centre for Market and Public Organisation (CMPO), University of Bristol	Bristol, United Kingdom	644	13
170	Département des sciences économiques, Université du Québec à Montréal (UQAM)	Montréal, Canada	643	29
171	École des Hautes Études Commerciales (HEC), Université de Lausanne	Lausanne, Switzerland	640	20
171	Faculty of Business, Queensland University of Technology	Brisbane, Australia	640	20
171	Dipartimento di Economia "S. Cognetti de Martiis", Università degli Studi di Torino	Torino, Italy	640	28
174	Laboratory of Economics and Management (LEM), Scuola Superiore Sant'Anna	Pisa, Italy	639	29
174	Department of Agricultural, Food and Resource Economics, Michigan State University	East Lansing, Michigan (USA)	639	21
(175)	Economics Section, Cardiff Business School, Cardiff University	Cardiff, United Kingdom	638	24
(175)	Center for International Development, Kennedy School of Government, Harvard University	Cambridge, Massachusetts (USA)	637	8
176	Department of Economics, Tufts University	Medford, Massachusetts (USA)	630	17
177	Department of Economics, University of Colorado	Boulder, Colorado (USA)	629	18
(177)	Research Department, Federal Reserve Bank of Philadelphia	Philadelphia, Pennsylvania (USA)	629	13
(177)	School of Economics and Finance, Faculty of Business, Queensland University of Technology	Brisbane, Australia	628	19
177	Andrew Young School of Policy Studies, Georgia State University	Atlanta, Georgia (USA)	628	19
179	Institut d'Anàlisi Econòmica (IAE), Consejo Superior de Investigaciones Científicas	Barcelona, Spain	627	22
179	Arbetsmarknadsdepartementet, Government of Sweden	Stockholm, Sweden	627	20
(179)	Institutet för Arbetsmarknadspolitisk Utvärdering (IFAU), Arbetsmarknadsdepartementet, Government of Sweden	Uppsala, Sweden	627	20
181	Institute for International Integration Studies (IIIS), Trinity College, University of Dublin	Dublin, Ireland	626	18
182	Department of Economics and Finance, Brunel University	Uxbridge, United Kingdom	621	15
183	Federal Reserve Bank of Cleveland	Cleveland, Ohio (USA)	615	13
184	Department of Economics, Ohio State University	Columbus, Ohio (USA)	614	19
185	Departament d'Economia i Història Econòmica, Universitat Autònoma de Barcelona	Barcelona, Spain	609	25
186	Facoltà di Economia, Università degli Studi di Venezia "Ca' Foscari"	Venezia, Italy	606	46
187	Wirtschaftswissenschaftliche Fakultät, Universität Hannover	Hannover, Germany	605	36
(187)	Laboratoire d'Économie des Ressources Naturelles (LERNA), Toulouse School of Economics (TSE)	Toulouse, France	603	20
187	Center for Research in Econometric Analysis of Time Series (CREATES), Aarhus Universitet	Aarhus, Denmark	603	20
189	Laboratoire d'Économétrie, École Polytechnique	Paris, France	602	26
189	Center for Economic Research and Graduate Education and Economics Institute (CERGE-EI)	Praha, Czech Republic	602	32
191	Department of Economics, Bar Ilan University	Ramat-Gan, Israel	596	12
191	Centraal Planbureau (CPB), Government of the Netherlands	Den Haag, Netherlands	596	27
193	Fondazione ENI Enrico Mattei (FEEM)	Milano, Italy	595	30
194	Graduate School of Business, Stanford University	Palo Alto, California (USA)	588	22
195	Federal Reserve Bank of Atlanta	Atlanta, Georgia (USA)	587	16
196	Department of Economics, University of Illinois at Chicago	Chicago, Illinois (USA)	586	18

Credits:

Citations from CitEc project by José Manuel Barrueco Cruz, University of Valencia, Spain. Hardware provided by Technical University of Valencia, Spain.
Abstract views and downloads statistics from LogEc project by Sune Karlsson, Örebro University, Sweden.
Author registration by Ivan Kumanov, Minsk, Belarus.
Institutions database and ranking computations by Christian Zimmermann, University of Connecticut.
RePEc has been initiated by Thomas Krichel, Long Island University.

We do our best, but we cannot exclude errors.