Pat Gunning and Warren Samuels have referred to "taxing the unearned increment" which from a Georgist perspective makes no sense to me. I don't recall George ever using the term "unearned increment" while he did advocate collecting all or almost all of the ground rent for public purposes at the same time eliminating all taxation of labor, capital and the wealth produced by labor and capital. Wasn't it Mill who proposed taxing the future increment in land values? What has not been mentiioned in this thread are the economic implications of land speculation. Since the selling price of land is ground rent not collected by the public or the community capitalized, it results in a very substantial speculative or anticipated ground rent in addition to actual ground rent received by the landowner. Just wondered if anyone considers entrepeneurship a fourth factor of production beyond land, labor and capital. Or, is an entrepeneur just a more skilled or knowledgeable laborer? Roy Davidson