Chapter 4 As export crop production is often a major employer of hired labour and gains most from a devaluation, employment and wages are likely to increase most in this sector. As export crop production is often concentrated regionally, employment and wage increases will be regionally concentrated, too. The effects on factor income depend, furthermore, on factor mobility between regions and sectors, as well as on differences in factor intensity in tradable and non-tradable sectors. As both the urban formal and informal sectors are adversely affected, while the agricultural sector is likely to gain, a devaluation may induce urban-rural migration or reduce rural-urban migration. Where this is the case, migration will smooth regional and sectoral employment and wage differentials. 3) Real income effects Any price change of a consumer good has a real income effect (see par. 3 of Annex 1 for a detailed description). The impact of product price variations induced by an exchange rate devaluation on real income depends on the share of the respective consumer goods in the household budget. The larger the share, the more significant is the impact on real income. The impact on real income depends, therefore, on the structure of household expenditures: the more a household spends on tradables, the more its real income will be affected. Here we find large differences between rural and urban households as well as between low and high income groups. Table 4.7: Impact of a 10 percent increase in the price of food on the real income of low-income and high-income households in selected countries Lowest Highest Country decile decile Source*) Decrease in real income (percent) Egypt 5.6 1.0 Aldermann and von Braun India 5.5 1.2 Mellor India 7.3 2.9 Murty Nigeria (Funtua) 7.7 6.5 Pinstrup-Andersen and Uy Nigeria (Gusau) 9.0 5.7 Pinstrup-Andersen and Uy Sri Lanka 8.5 4.1 Sahn Thailand 6.0 2.0 Trairatvorakul *) Data from various sources, compiled by Pinstrup-Andersen (1987) Rural households will, in general, be less affected, due to the importance of subsistence production, and as they usually devote a relative small percentage of their budget to tradable commodities. There are, however, exceptions to this, for example in areas where export crops are produced in mono-culture and where people depend on the market for supplies of food and other consumer goods from abroad. - 129-