At average wage levels, labour taxes seem to be shared between higher labour costs and lower take-home pay, although the relative magnitude of these effects varies significantly across countries (OECD, 2007). Hence, compared with most OECD countries, the overall effect of social contributions/the tax wedge on the labour market is likely to be much more important for the composition of employment rather than for the overall employment level - other things being equal, the higher the tax wedge, the higher the share of informal employment. Figure 2.15 shows an augmented tax wedge which, in addition to the taxes and social contributions, also includes those compulsory payments made to private programmes (such as pension funds in Chile and Mexico, unemployment accounts in Chile and housing fund in Mexico).