1. Lexis Wilhelm Lexis. Born 17 July 1837 in Eschweiler (near Aachen), Germany Died 25 Oct1914 in Göttingen, Germany. Click the picture above to see a larger version http://www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Lexis.html

Wilhelm Lexis Born: 17 July 1837 in Eschweiler (near Aachen), Germany Died: Click the picture above to see a larger version Show birthplace location Previous (Chronologically) Next Biographies Index Previous (Alphabetically) Next Main index Wilhelm Lexis attended the University of Bonn where he was awarded a degree in mathematics and then went on to write a thesis on analytical mechanics. He graduated in 1859 and then went to Heidelberg where he undertook research in Bunsen's chemistry laboratories. Despite the fact that his training up to this point had been a broad one, in 1861 Lexis went to Paris to study social sciences. These studies led to his first publication in 1870 which was on the export policies of France. Heiss writes in [4]:- This work displays the feature that characterises his later economic writings: a scepticism towards "pure economics" and towards the application of supposedly descriptive mathematical models which have no reference to economic reality. Even in this early work he insisted that economic theory should be founded on quantitative economic data. In 1872 Lexis was appointed as professor of economics at the University of Strassburg. He held this post for two years and during this time he worked on his second major publication on the theory of population which was published in 1875. By this time, however, he was in Dorpat having been appointed to the chair of geography, ethnology and statistics in 1874. Again he held this post for only two years before he was appointed to the chair of economics at Freiburg.

2. Grands Auteurs En Sciences économiques Translate this page 1924) Leontiev Wassily (1906-1999) Lerner Abba (1903-1982) Leroy-Beaulieu Paul (1843-1916)Lewis Arthur W. (1915-1991) lexis wilhelm (1837-1914) Lindahl Erik http://www.aix-mrs.iufm.fr/formations/filieres/ses/ressourcesdocu/auteurssceco.h

Les grands auteurs Aftalion Albert (1874-1956) Bachelard Gaston (1884-1962) Bacon Francis (1561-1626) Bagehot Walter (1826-1877) Bairoch Paul (1930-1999) Bakounine Michel (1814-1876) Baran Paul (1910-1964) Barone Enrico (1859-1924) Bauer Otto (1882-1950) Bentham Jeremy (1748-1832) Bernstein Edouard (1854-1938) Beveridge William H. (1879-1963) Bodin Jean (1530-1596) Boisguilbert Pierre de (1646-1714) Boukharine Nicolas (1888-1938) Boulding Kenneth E. (1910-1993) Braudel Fernand (1902-1985) Burnham James (1905-1987) Cairnes John Elliot (1823-1875) Cantillon Richard (1697-1734) Cassel Gustav (1866-1945) Chamberlin Edward H. (1899-1967) Chevalier Michel (1806-1879) Clark Colin Grant (1905-1989) Clark John Bates (1847-1938) Clark John Maurice (1884-1963) Colbert Jean-Baptiste (1619-1683) Commons John Rogers (1862-1945) Condorcet M. C. (1734-1794) Cournot Augustin (1801-1877) Denison Edward F. (1915-192) Dilthey Wilhelm (1833-1911) Dobb Maurice Herbert (1900-1976) Domar Evsey David (1914-1997) Duhem Pierre (1861-1916) Dupont de Nemours Pierre (1739-1817) Dupuit Jules (1804-1866) Edgeworth Francis Ysidro (1845-1925) Emmanuel Arghiri (1911-2001) Engels Friedrich (1820-1895) Fayol Henri (1841-1925) Feyerabend Paul (1924-1994) Fisher Irving (1867-1947) Ford Henry (1863-1947) Fourier Charles (1772-1837) Friedmann Georges (1905-1977) Frisch Ragnar (1899-1973) Fullarton John (1790-1849) Garnier Joseph (1813-1881) Georgescu-Roegen Nicolas (1906-1994) Gerschenkron Alexander (1904-1978) Gide Charles (1874-1932) Gossen Hermann Heinrich (1810-1858)

3. Biblioteca Argentina Para Ciegos - Catálogo Braille - Varios Translate this page Laberéne Paul, El origen de los mundos, 6, 1977. lexis wilhelm,El comercio, 4, 1692. Lo Gatto Héctor, Historia del teatro ruso,6, 1550. http://www.bac.org.ar/BibBraille/variosb.htm

Varios Volver al catálogo Página Principal AUTOR TÍTULO TOMOS Nº DE ORDEN Alpherat Tratado de astrología Autores Varios La conquista de la tierra Autores Varios La economía... a lo claro Ayudantes Técnicos Sanitarios Unificación de las carreras de practicantes, matronas y enfermeras (1º año) Barón Fernández José Manual de puericultura Batardón León La contabilidad al alcance de todos Bayet C. Historia del arte Beck Lester F. Educación sexual para preadolescentes Berardi Lamberto Apuntes de mineralogía Biblioteca "Los Genios" Los genios de la educación Binayán Narciso Antología didáctica de sarmiento Boll Marcel Qué es: el azar, el vacío, el calor, la luz, la electricidad, el sonido, la afinidad Bonel María Juana Apuntes decorte yconfección Burnet M. Historia de las enfermedades infecciosas Calleja Guijarro Tomás Dramatizaciones Capo Nicolás Cura de naranjas Carbia María A. de +cómo es la cocina mexicana de marichu? Coctor La cocina práctica casera Colaþo María Rosa El niño y la vida Comisión Nacional del Antártico Soberanía argentina en la antártida Compayré G.

4. Les Documents lexis wilhelm Lexis la représentation graphique de la mortalitéau moyen de points mortuaires , Annales de démographie internationale http://u2.u-strasbg.fr/lexis/html/docs/docddl.html

les documents Le "vrai" diagramme de Lexis Wilhelm Lexis "la représentation graphique de la mortalité au moyen de points mortuaires", Annales de démographie internationale, IV, 1880, p. 297-324 Source : iconographie et texte Dupâquier (Jacques et Michel), Histoire de la Démographie, Paris, Librairie Académique Perrin, 1985, page 388 Texte explicatif, cité dans Histoire de la Démographie, 462 p. dernière révision : 27 janvier 1998 Fac simile du diagramme de Lexis (Histoire de la Démographie, page 388) Attention, depuis 1880, le diagramme porte le même nom, mais les conventions ont changé ! ... Lisez le texte explicatif et comparez le aux conventions présentées en cours. Les deux schémas ci-dessous vous aideront à comprendre la différence. Retenez que les conventions contiennent une part d'arbitraire, et, qu'en conséquence, il faut les apprendre PAR COEUR. Texte explicatif, cité dans Histoire de la Démographie, page 389 les points chronologiques [...] semblent donc être en quelque sorte étirés sur le plan des points mortuaires, en lignes inclinées à 45° [...]. Ces lignes inclinées nous les appelons "isochrones". Elles servent à limiter les périodes d'observation, comme les horizontales délimitent les rangs d'âge et les verticales, les générations... Tou sles points mortuaires qui tombent entre les lignes N U et N U apparteinnent à la période d'observation N N Zoom sur les "points mortuaires" Où l'on voit nettement les semis de points mortuaires, de densité variable

5. Widmung / Festgaben Fuer Wilhelm Lexis Widmung / Festgaben für wilhelm lexis Festgaben für wilhelm lexis zur siebzigsten Wiederkehr seines Geburtstages / dargebracht von G. Adler, Jena, 1907 UB-Signatur K 188-6 http://www.ub.uni-heidelberg.de/helios/fachinfo/www/math/zitat/lexis-festgaben.h

UB-Signatur: K 188-6 Verehrter Meister! In multos annos! Aktuelles Unser Service Virtuelle Bibliothek Helios Kataloge ... Impressum

6. Tilastokeskus - Tilastokoulutus - Verkkokoulu - Johdatus Väestötieteen Peruste 2.9 wilhelm lexis ja graafinen kuvio 1800luvulla saksalainen matemaatikko ja taloustieteilijä wilhelm lexis (1837-1914) kehitti kaksiulotteisen tarkastelun, joka auttaa väestöilmiöiden ajallista tarkastelua. wilhelm lexis tarkasteli koordinaatistossa, x-akselilla vuosia ja y-akselilla esimerkiksi ikää. http://www.stat.fi/tk/tp/verkkokoulu/vk/vt/oppitunnit/vt02/vt02_09/view.html

Väestöön liittyvää tietoa: StatFin-palvelu Suomi lukuina Tilasto-opas Verkkokoulu ... Verkkokoulu Kurssi: Johdatus väestötieteen perusteisiin Oppitunti 2: Väestötieteen historia 2.9 Wilhelm Lexis ja graafinen kuvio 1800-luvulla saksalainen matemaatikko ja taloustieteilijä Wilhelm Lexis (1837-1914) kehitti kaksiulotteisen tarkastelun, joka auttaa väestöilmiöiden ajallista tarkastelua. Wilhelm Lexis tarkasteli koordinaatistossa, x-akselilla vuosia ja y-akselilla esimerkiksi ikää. Eri akselien aikayksiköt ovat samansuuruisia eli yhtä ikävuotta vastaa yksi kalenterivuosi. Lexis-kuvio helpottaa iän karttumisen ja vuosien kulumisen seurantaa. Samaan aikaan kun Wilhelm Lexis kehitti kuviota myös saksalaiset väestötieteilijät Karl Becker ja Gustav Zeuner kehittelivät samanlaista väestöilmiöiden kuvaamismenetelmää. Usein kuviota kutsutaan myös heidän sukunimiensä mukaan. Lexis-kuviota tarkastellaan lähemmin oppitunnilla 6. Sivua muokattu viimeksi perjantaina 28.02.2003 klo 18:02 Tulostettava versio

7. Apuntes Demografía Económica Y Empresarial lexis, wilhelm. La siguiente información biográfica está basada en artículo escrito por K. Oldenberg, contenida en http://webpages.ull.es/users/dgodenau/lexis.htm

LEXIS, WILHELM [La siguiente información biográfica está basada en artículo escrito por K. Oldenberg, contenida en la crónica de la Georg-August-Universität zu Göttingen correspondiente al año 1914.] Nació el 17 de julio de 1837 en Eschweiler (Alemania). En sus estudios universitarios iniciados en 1855 se dedicó a las matemáticas y las ciencias naturales. Después de su tesis doctoral defendida en 1859, trabajó temporalmente en un instituto de enseñanzas medias en Bonn y posteriormente en el laboratorio químico de Bunsen en Heidelberg. En el año 1861 se fue a Paris y se dedicó durante una década al estudio de la economía, trabajando como periodista. En el año 1872 se convirtió en profesor extraordinario de economía nacional en la universidad de Estrasburgo; 1874 profesor ordinario de geografía, etnografía y estadística en Dorpat; 1876 profesor ordinario de economía nacional en Friburgo; 1884 en Breslau; 1887 en Gotinga. Murió el 24 de agosto de 1914. Buena parte de la obra de Lexis está marcada por el intento de superar la corriente del historicismo alemán a través de la aplicación de mediciones estadísticas procedentes de las ciencias naturales en el campo de la demografía y economía. En este sentido, entre sus primeros trabajos figuran aquellos que ayudaron a la fundamentación matemática de la demografía. En el campo de las matemáticas se hizo un nombre propio por la Teoría de la dispersión . En el año 1903 se publicó una obra que resume esta fase de incursiones estadísticas y matemáticas en el campo de las ciencias sociales. Aparte de las investigaciones de esta índole, también publicó múltiples trabajos en el campo de la economía (teoría del dinero y del sistema financiero, ciencias de los seguros).

8. Nachrufe 61, 26. lexis, wilhelm (1837-1914). 23, 314-317 http://www.mathematik.uni-bielefeld.de/DMV/archiv/nachrufe.html

Nachrufe im Jahresbericht der DMV A B C D ... Z Abbe, Ernst (1840-1905) Ahrens, Wilhelm (1872-1927) Avakumovic, Vojislav G. (1910-1990) Bachmann, Paul (1837-1920) Baier, Othmar (1905-1980) Bauer, Gustav (1820-1906) Beck, Hans (1876-1942) Bernstein, Felix (1878-1956) Bieberbach, Ludwig (1886-1982) Bilharz, Herbert (1910-1956) Bjerknes, Carl (1825-1903) Blaschke, Wilhelm (1885- 1962) Bobek, Karl (1855-1899) Boerner, Hermann (1906-1982) Bohl, Piers (1865-1921) Bohr, Harald (1887- 1951) Bolza, Oskar (1857 1942) Bopp, Karl (1877-1934) Bortolotti, Enea (1896-1942) Bos, Werner (1924-1973) Brandt, Heinrich (1886-1954) Brauer, Alfred (1894-1985) Brauer, Richard (1901-1977) Brunn, Hermann (1862-1939) Buka, Felix (1852-1896) Burkhardt, Heinrich (1861-1914) Burmester, Ludwig (1840-1927) Busche, Edmund (1861 1916) Cantor, Georg (1845-1918) Caratheodory, Constantin (1873-1950) Caspar, Max (1880-1956) Nachtrag Caspary, Ferdinand (1853-1901) Curtze, Maximilian (1837-1903) Czuber, Emanuel (1851-1925) Darboux, Gaston (1842-1917) Dembowski, Peter (1928-1971) Deuring, Max (1907-1984)

9. Lexis Biography of wilhelm lexis (18371914) wilhelm lexis. Born 17 July 1837 in Eschweiler (near Aachen), Germany http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Lexis.html

Wilhelm Lexis Born: 17 July 1837 in Eschweiler (near Aachen), Germany Died: Click the picture above to see a larger version Show birthplace location Previous (Chronologically) Next Biographies Index Previous (Alphabetically) Next Main index Wilhelm Lexis attended the University of Bonn where he was awarded a degree in mathematics and then went on to write a thesis on analytical mechanics. He graduated in 1859 and then went to Heidelberg where he undertook research in Bunsen's chemistry laboratories. Despite the fact that his training up to this point had been a broad one, in 1861 Lexis went to Paris to study social sciences. These studies led to his first publication in 1870 which was on the export policies of France. Heiss writes in [4]:- This work displays the feature that characterises his later economic writings: a scepticism towards "pure economics" and towards the application of supposedly descriptive mathematical models which have no reference to economic reality. Even in this early work he insisted that economic theory should be founded on quantitative economic data. In 1872 Lexis was appointed as professor of economics at the University of Strassburg. He held this post for two years and during this time he worked on his second major publication on the theory of population which was published in 1875. By this time, however, he was in Dorpat having been appointed to the chair of geography, ethnology and statistics in 1874. Again he held this post for only two years before he was appointed to the chair of economics at Freiburg.

10. References For Lexis References for wilhelm lexis. Books wilhelm lexis, Neue Deutsche Biographie(Berlin, 1952). Articles AA Chuprov, wilhelm lexis, Izv. Akad. Nauk Pgd. http://www-gap.dcs.st-and.ac.uk/~history/References/Lexis.html

References for Wilhelm Lexis Books: Wilhelm Lexis, Neue Deutsche Biographie (Berlin, 1952-). Articles: A A Chuprov, Wilhelm Lexis, Izv. Akad. Nauk Pgd. VI Estadist. Espanola No. K-P Heiss, Wilhelm Lexis, International Encyclopedia of the Social Sciences Vol 9 (New York, 1968), 271-276. S M Stigler, The measurement of uncertainty in nineteenth-century social science, in The probabilistic revolution Vol. 1 (Cambridge, MA-London, 1987), 287-292. S M Stigler, The History of Statistics. The Measurement of Uncertainty before 1900 (Cambridge, Mass.-London, 1986), 222-. L von Bortkiewicz, Wilhelm Lexis, Bull. Int. Statist. Inst. S L Zabell, Wilhelm Lexis, in N L Johnson and S Kotz (eds.), Leading personalities in statistical sciences (New York, 1997), 305-307. Main index Birthplace Maps Biographies Index History Topics ... Anniversaries for the year JOC/EFR May 2000 School of Mathematics and Statistics University of St Andrews, Scotland The URL of this page is: http://www-history.mcs.st-andrews.ac.uk/history/References/Lexis.html

11. Wilhelm Lexis 7. 1979, S. 123. lexis, wilhelm, Volkswirt und Statistiker, http://www.rzuser.uni-heidelberg.de/~f25/homo-heid/lexis.htm

Wilhelm Lexis Forschung in Bunsens Chemielabor Lexis, Wilhelm (1837 - 1914) Lexika WWW-Biographien Print-Biographien Werk ... Bibliographien Lexika Der grosse Brockhaus. - 18. Aufl. - Wiesbaden Bd. 7. - 1979, S. 123 Lexis, Wilhelm, Volkswirt und Statistiker, Bd. 15. - 1979, S. 31-32 Lexis, Literatur: HdSW 6, 1959. S. 590. - Festgabe f. W. L. Hg. v. G. Adler u.a. Jena 1907. Lebensdaten 1859 Arbeit bei Bunsen in Heidelberg 1861 Volkswirtschaftliche Studien im Ausland 1872 Prof. f. Volkswirtschaft in Strassburg 1874 Prof. f. Geographie, Ethnographie und Statistik in Dorpat 1876 Doz. in Freiburg 1884 Doz. in Breslau Top WWW-Biographien Biographie vom St. Andrews Archiv / Geschichte des Instituts Bildnis (University of York / Department of Mathematics) Top Print-Biographien Nachruf im Jahresbericht der deutschen Mathematiker-Vereinigung, Bd. 23 (1914), S. 314-317 von F. Klein UB-Signatur:L 22::23.1914 Auch die Arbeit im chemischen Laboratorium von Bunsen in Heidelberg konnte ihn nicht lange fesseln. Neue deutsche Bibliographie. - Berlin Bd. 14 (1985), S. 421-422

12. Wilhelm Lexis Translate this page Forschung in Bunsens Chemielabor lexis, wilhelm (1837 - 1914). lexis, wilhelm, Volkswirtund Statistiker, * Eschweiler 17.7.1837, + Göttingen 24.8.1914, Prof. http://www.ub.uni-heidelberg.de/helios/fachinfo/www/math/homo-heid/lexis.htm

Wilhelm Lexis Forschung in Bunsens Chemielabor Lexis, Wilhelm (1837 - 1914) Lexika WWW-Biographien Print-Biographien Werk ... Bibliographien Lexika Der grosse Brockhaus. - 18. Aufl. - Wiesbaden Bd. 7. - 1979, S. 123 Lexis, Wilhelm, Volkswirt und Statistiker, Bd. 15. - 1979, S. 31-32 Lexis, Literatur: HdSW 6, 1959. S. 590. - Festgabe f. W. L. Hg. v. G. Adler u.a. Jena 1907. Lebensdaten 1859 Arbeit bei Bunsen in Heidelberg 1861 Volkswirtschaftliche Studien im Ausland 1872 Prof. f. Volkswirtschaft in Strassburg 1874 Prof. f. Geographie, Ethnographie und Statistik in Dorpat 1876 Doz. in Freiburg 1884 Doz. in Breslau Top WWW-Biographien Biographie vom St. Andrews Archiv / Geschichte des Instituts Bildnis (University of York / Department of Mathematics) Top Print-Biographien Nachruf im Jahresbericht der deutschen Mathematiker-Vereinigung, Bd. 23 (1914), S. 314-317 von F. Klein UB-Signatur:L 22::23.1914 Auch die Arbeit im chemischen Laboratorium von Bunsen in Heidelberg konnte ihn nicht lange fesseln. Neue deutsche Bibliographie. - Berlin Bd. 14 (1985), S. 421-422

13. Lexis, Wilhelm - Gedächtnis Berlin Translate this page lexis, wilhelm. * 17.07.1837 Eschweiler bei Aachen (RheinProvinz). †24.08.1914 Göttingen (Provinz Hannover). Nationalökonom. Straße http://www.luise-berlin.de/Ehrung/l/lexis_wilhelm.htm

Lexis , Wilhelm * 17.07.1837 Eschweiler bei Aachen (RheinProvinz) www.berlin-geschichte.de hib@luise-berlin.de

14. References For Lexis References for the biography of wilhelm lexis A A Chuprov, wilhelm lexis, Izv. Akad. Nauk Pgd. http://www-history.mcs.st-and.ac.uk/References/Lexis.html

References for Wilhelm Lexis Books: Wilhelm Lexis, Neue Deutsche Biographie (Berlin, 1952-). Articles: A A Chuprov, Wilhelm Lexis, Izv. Akad. Nauk Pgd. VI Estadist. Espanola No. K-P Heiss, Wilhelm Lexis, International Encyclopedia of the Social Sciences Vol 9 (New York, 1968), 271-276. S M Stigler, The measurement of uncertainty in nineteenth-century social science, in The probabilistic revolution Vol. 1 (Cambridge, MA-London, 1987), 287-292. S M Stigler, The History of Statistics. The Measurement of Uncertainty before 1900 (Cambridge, Mass.-London, 1986), 222-. L von Bortkiewicz, Wilhelm Lexis, Bull. Int. Statist. Inst. S L Zabell, Wilhelm Lexis, in N L Johnson and S Kotz (eds.), Leading personalities in statistical sciences (New York, 1997), 305-307. Main index Birthplace Maps Biographies Index History Topics ... Anniversaries for the year JOC/EFR May 2000 School of Mathematics and Statistics University of St Andrews, Scotland The URL of this page is: http://www-history.mcs.st-andrews.ac.uk/history/References/Lexis.html

15. Straßen, Teil Hol* Translate this page Leuschner, Bruno Leuschner, wilhelm Leuthinger, Nikolaus Levetzow, Albert ErdmannKarl Lewald, Fanny Lewald, Theodor Lewin, Louis lexis, wilhelm Leyden, Ernst http://www.luise-berlin.de/ehrung/Navi/E_str0070.htm

3418 Namen Anfang... Hol... Holbein Holbein ... Hol...

16. Wilhelm Lexis wilhelm lexis attended the University of Bonn where he was awarded a degree inmathematics and then went on to write a thesis on analytical mechanics. http://www.shsu.edu/~icc_cmf/bio/lexis.html

Lexis studied data presented as a series over time thus initiating the study of time series. ~ http://www-history.mcs.st-andrews.ac.uk/history/Mathematicians/Lexis.html Born: July 17, 1837 in Eschweiler, Germany Died: October 25, 1914 in Gottingen, Germany Wilhelm Lexis attended the University of Bonn where he was awarded a degree in mathematics and then went on to write a thesis on analytical mechanics. He graduated in 1859 and then went to Heidelberg where he undertook research in Bunsen's chemistry laboratories. Despite the fact that his training up to this point had been a broad one, in 1861 Lexis went to Paris to study social sciences. These studies led to his first publication in 1870 which was on the export policies of France. Heiss writes in [4]:- This work displays the feature that characterises his later economic writings: a scepticism towards "pure economics" and towards the application of supposedly descriptive mathematical models which have no reference to economic reality. Even in this early work he insisted that economic theory should be founded on quantitative economic data. In 1872 Lexis was appointed as professor of economics at the University of Strassburg. He held this post for two years and during this time he worked on his second major publication on the theory of population which was published in 1875. By this time, however, he was in Dorpat having been appointed to the chair of geography, ethnology and statistics in 1874. Again he held this post for only two years before he was appointed to the chair of economics at Freiburg.

17. Lexis Portrait Portrait of wilhelm lexis wilhelm lexis. JOC/EFR August 2001 http://www-history.mcs.st-and.ac.uk/history/PictDisplay/Lexis.html

Wilhelm Lexis JOC/EFR August 2001 The URL of this page is: http://www-history.mcs.st-andrews.ac.uk/history/PictDisplay/Lexis.html

18. Tilastokeskus - Tilastokoulutus - Verkkokoulu - Johdatus Väestötieteen Peruste 2.9 wilhelm lexis ja graafinen kuvio. wilhelm lexis tarkasteli koordinaatistossa,xakselilla vuosia ja y-akselilla esimerkiksi ikää. http://www.stat.fi/tk/tp/verkkokoulu/vk/vt/oppitunnit/vt02/vt02_09/view.html?tul

19. Events Room 005. ("wilhelmlexis" Conference Room). Gunnar Andersson Room 005. ("wilhelm-lexis" Conference Room). IMPRSD Lectures Room 005. ("wilhelm-lexis" Conference Room). IMPRSD http://www.demogr.mpg.de/calendar

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20. Wilhelm Lexis (biography) Breve reseña de la vida de wilhelm lexis en inglés recogida de laspáginas de la Universidad de St. Andrews de Escocia. wilhelm lexis. http://www.terra.es/personal2/xberna/wlexis.htm

Wilhelm Lexis Born: 17 July 1837 in Eschweiler, Germany From 1876-79 Wilhelm Lexis studied data presented as a series over time. He initiated the study of time series with his 1879 article On the theory of the stability of statistical series. Lexis required a binomial dispersion for his series to be stable and this ruled out most interesting series. However it applied to the problem of year to year fluctuation of the sex ratio among children born in a city. It posed the question of whether an empirical index of dispersion is consistent with the assumption that sex is governed by a simple chance mechanism. Article by: J J O'Connor and E F Robertson JOC/EFR December 1996 The URL of this page is: http://www-history.mcs.st-andrews.ac.uk/history/Mathematicians/Lexis.html Retroceder © Ximo Bernà i Torres. Actualizado en 1/5/2001 xberna@teleline.es ximoberna@inicia.es

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