A Model of Growth Through Creative Destruction
Philippe Aghion; Peter Howitt
Econometrica, Vol. 60, No. 2. (Mar., 1992), pp. 323-351.

Competition, Imitation and Growth with Step-by-Step Innovation
Philippe Aghion; Christopher Harris; Peter Howitt; John Vickers
The Review of Economic Studies, Vol. 68, No. 3. (Jul., 2001), pp. 467-492.

Growth and Unemployment
Philippe Aghion; Peter Howitt
The Review of Economic Studies, Vol. 61, No. 3. (Jul., 1994), pp. 477-494.