1. de Montgolfier - Kouevi and Vlavonou (1981) estimated income elasticities of 1.08, 1.20 and 1.20 for meat, milk and eggs respectively in Nigeria. These estimates are very close to those derived by the IBRD Agricultural Sector Review Mission of 1978.
2. Export duties on livestock are not an important feature of trade policy since livestock exports from Nigeria have been almost non-existent, except for some hides and skins.
3. The Central Bank of Nigeria figures show that government revenue rose from It 633 million in 1970 to N8,039 million in 1977. Between 1972 and 1974 government oil revenue rose five-fold to form over 80% of total revenue.
4. Retail prices for beef and poultry meat were officially controlled between 1976 and 1979. However, the official prices proved difficult to enforce and the scheme was eventually discountinued.
5. The nominal protection coefficient measures the extent to which domestic prices diverge from world equivalent prices. It has been estimated using the formula:
where 
is the domestic producer price of commodity i, E is the official (or adjusted) exchange rate and 
is the world price equivalent at the farm gate of commodity i. A NPC less than one indicates that policy is a potential disincentive to production, i.e. producers are being taxed. Conversely, a NPC greater than one indicates that policy measures such as tariffs or other import restrictions protect (i.e. subsidise) domestic producers.
6. The adjusted exchange rate is meant to correct for distortions in the official exchange rate. The extent of overvaluation of the latter was estimated using the differential inflation rate between domestic prices (approximated by the consumer price index) and foreign prices (based on the consumer price index of industrialized countries). The year Nigeria's currency was changed from the pound to the naira, 1973 was used as the base year.
