Research and Researchers over the years
Time Period	Student Researchers	Faculty Consultants	Authors Using ICPP Data
1966 to 1979	Undergraduate and graduate students involved in the original data collection phase of the project	Scholars who advised on the original study and who served as country experts	Most publications during this phase were methodological, but several dissertations were produced
1980 to 1990	Most students helped with data analysis during this period	Only a few outside scholars were involved during this phase	Former students and scholars elsewhere began to use the data
1991 to 1999	Many students at Northwestern and Texas A&M helped with the longitudinal data	Most help came from country experts, like Lars Bille on Denmark	Numerous graduate students of Harmel and Janda authored or co-authored papers using the data
2000 and later	Northwestern students engaged in the 2000 Initiative; Texas A&M students released the party change data set	We expect scores of scholars across the world to become Country Consultants, helping to update the ICPP data