The Liberal Party was one of the original parties in Janda's 1950-1962 ICPP study. The party continued throughout 1950-1990 in the Harmel-Janda study of party change in Denmark, Germany, the U.K. and U.S.

The essay on party politics in Denmark from 1950 to 1962 says:

The Liberal Party (Venstre) tended to decline in strength after 1962, but it did participate in coalition governments with the Conservatives and Radicals (1968-1971), formed a minority government (1973-1975), and entered an unusual coalition with the Social Democrats in 1978.

The essay on party politics in Denmark from 1963 to 2000 says:

Legislative strength for the Venstra declined after the original ICPP period, as the party shed roughly 35 percent of its seats from its ICPP high in 1958 to the induction of the 1972 legislature (26 percent of the seats in 1958, 17 percent in 1972). After the V's prospects briefly revived in 1975--doubling the party's returns from the 1973 "earthquake" election (Thomas and Oakley, 1998: 266) -- but then sunk to the 12 percent level in the 1977 elections, at which plateau the V remained throughout the 1980s. Despite this significant decline in legislative strength, the V still managed to exercise considerable strength in the government, joining a coalition with the Radical Liberal Party (RV) from 1968-1971, leading a minority cabinet from 1973-1975, joining an unusual coalition with the Social Democratic Party (SD) from 1978-1979, and formed a key component in all the Conservative cabinets throughout the 1980s. The party's fortunes revived in the 1990s, jumping to 17 percent of the seats in 1990 to around 25 percent after the 1994 elections.

Consult the index to variables for annual scores of the party's issue orientation, organizational complexity, centralization of power, and coherence from 1950 through 1990.