- Engels, Friedrich, 1820-1895 (6)
- Marx, Karl, 1818-1883 (6)
- Untermann, Ernest (3)
- Aveling, Edward Bibbins, 1851-1898 (2)
- Moore, Samuel (2)
- Clark, John Bates, 1847-1938 (1)
- Dewey, Donald (1)
- Lindahl, Erik Robert, 1891- (1)
- Pilling, Geoffrey (1)
- Scazzieri, Roberto (1)
- Sen, Amartya Kumar, 1933- (1)
- Zamagni, Stefano, 1943- (1)