Empirismos del nuevo mundo By Zurdo Period: Jan 1, 1900 to Sep 1, 1980 Emprims of the new world Jan 1, 1903 Robert Ezra Pack Period: Jan 1, 1910 to Jan 1, 1927 Escuela de Chicago Sep 20, 1921 Park - Burguess Sep 21, 1922 Walter Lippman Sep 20, 1927 John Dewey Sep 20, 1927 Harold Laswell Period: Sep 21, 1927 to Sep 21, 1980 Desarrollo de Agenda setting Period: Sep 21, 1927 to Sep 21, 1945 Mass Communication Research Sep 21, 1935 Kurt Lewin Sep 20, 1939 Serge Tchakhotine Sep 21, 1940 Paul Lazarsfeld Sep 20, 1948 Harold Laswell Sep 21, 1949 Merton - Lazarsfeld Sep 21, 1952 Bernard Berelson Sep 21, 1955 Paul Lazarsfeld Sep 21, 1955 Kurtis - Gladys Lang Sep 21, 1963 Bernard Cohen Sep 21, 1972 McCombs - Shaw