The data come from a survey of household expenditure and give the expenditure of 20 single men(M) and 20 single women (W) on four commodity groups. The units of expenditure are Hong Kong dollars, and the commodity groups (CG) are as follows:

  1. Housing, including fuel and light
  2. Foodstuffs, including alcohol and tobacco
  3. Other goods, including clothing, footwear and durable goods
  4. Services, including transport and vehicles


Aitchison, J. (1986). The Statistical Analysis of Compositional Data. Chapman and Hall.