Lancaster | Avro Lancaster | Lancaster University | Burt Lancaster | Lancaster, Pennsylvania | House of Lancaster | Lancaster County, Pennsylvania | Lancaster, Lancashire | Chancellor of the Duchy of Lancaster | Duchy of Lancaster | Kelvin | Lancaster County | Lancaster Castle | Don Lancaster | Lancaster House | Lancaster, Ohio | Kelvin MacKenzie | William Thomson, 1st Baron Kelvin | Lancaster, California | John of Gaunt, 1st Duke of Lancaster | Red Rose of Lancaster | Lancaster Royal Grammar School | Lancaster, New York | Lancaster, Massachusetts | Eleanor of Lancaster | Roy Lancaster | Lord Kelvin | Lancaster House Agreement | La cagaste... Burt Lancaster | Lancaster Township |
Canadian economist Richard Lipsey and Australian economist Kelvin Lancaster showed in a 1956 paper that if one optimality condition in an economic model cannot be satisfied, it is possible that the next-best solution involves changing other variables away from the ones that are usually assumed to be optimal.