1. 1. These statistics correspond to the number of people ranked ?not free? inGastil. [1979 ].
2. 2. The only exception that I am aware of is Theil[1979 ].
3. 3. In addition, seeFriedman[1956 ] or any issue of The Libertarian magazine.
4. 4. See Stigler'S essay ?The Unjoined Debate ? inStigler[1975 ].
5. 5. Alternatives include the number of political prisoners (Amnesty International), the speaking lime of members of parliament (Blondel[1973 ]) and the volume of international mail (Claude[1976]).