Instructional dataset, Accompanying An Introduction to Classical Econometric Theory Paul A. Ruud, Oxford University Press, 2d ed. (c) 2000 Datasets also accessible in ASCII from http://elsa.berkeley.edu/users/ruud/cet/data.html Timeseries data, 328 weeks, from Rob Porter. 21 variables, including week (week of observation), lakes (indicator variable for whether the Great Lakes were open to navigation by cargo steamships), gr (price variable, an index of prices reported by member firms to the cartel), pa (indicator variable for when collusive behavior was reported by a trade magazine called the Railway Review), tqg (quantity variable, the total tonnage of grain shipped by members of the cartel in a week), dm1-dm4 (four indicator variables for structural changes (market entry and exit)), seas1-seas12 (twelve indicator variables for various seasons)
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