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Maize is an important staple crop in Southern Africa that has often been prioritised from a policy perspective, particularly in the imposition of export controls under periods of perceived uncertainty. This tendency has been particularly relevant in Zambia, which has also emerged as an important surplus producer in Southern Africa in recent years. Its favourable transport differential and non-GM maize has helped Zambia grow its share in Zimbabwean maize imports at the expense of South Africa, but exports into Zimbabwe remains competitive between the two countries and particularly during periods of export control in Zambia, South Africa typically steps in to supply the deficit. This study therefore evaluates the extent of price transmission between Zambia, South Africa and Zimbabwe under two exogenous regimes defined by periods of open trade and trade controls imposed by the Zambian government. It uses secondary data of monthly white maize prices in these three markets to quantify the long and short run price relationships under different regimes. While several authors have noted that trade is not a prerequisite for price transmission between markets, this study finds evidence that the imposition of policies that inhibit trade also influences the rate and nature of price transmission between markets. Periods of open trade were characterised by efficient transmission of prices from Zambia to Zimbabwe, which is in line with typical trade patterns, but during periods of trade controls, no relationship was found between Zambian and Zimbabwean markets, with prices being transmitted from South Africa to Zimbabwe instead.

This study summarizes research on farm-, local-, regional-, and macro-level economic effects of ethanol production. Given current production levels, the ethanol production industry annually employees approximately 3,500 workers, pays out nearly $132 million in worker salaries, generates over $110 million in local taxes, and takes in some $2 billion in government incentive payments. Projections for a 60 million gallon per year ethanol plant indicate an annual increase in corn usage of 21 million bushels, a one-time capitalization of $75 million, an increase in local corn prices of between $0.06/bushel and $0.12/bushel, a 54 direct and a 210 indirect jobs created, an increase in local tax revenues of $1.2 million, a decrease in federal commodity program outlays of $30 million, and an increase in ethanol production incentives (federal only) of around $30.5 million.

Renewable Identification Numbers (RINs) were developed to act as tracking mechanisms that ensure compliance with the U.S. biofuel use mandates legislated in 2005 and increased and adjusted to include sub‐mandates in 2007. Reviewing the rules for RIN production and use, we conclude that RIN prices will be hierarchical, and rollover provisions allow stock‐holding. We illustrate our interpretation by constructing RIN supply and use tables, and by discussing how expiring tax credits and the specific tariff raise RIN prices and mandate costs. RIN markets are critical for estimating biofuel use mandate effects on biofuel and feedstock markets and welfare.

The study evaluates the impact of World Trade Organization (WTO) restrictions on the European Union (EU) sugar sector and the world sugar market. A small reduction in production quotas would be sufficient to satisfy the export subsidy limitations of the Uruguay Round agreement. Complete elimination of export subsidies by 2005 would require either a 10% reduction in production quotas or the combination of an 8% reduction in quotas and an 11% reduction in intervention prices. Higher world prices resulting from reduced EU exports would result in increased production of unsubsidized C-sugar, with different impacts across EU member countries explained by differences in institutional pricing arrangements and marginal production costs.

The 2014 farm bill reduced expected budgetary costs of US farm programs, according to estimates prepared by the Congressional Budget Office. Cost projections are very sensitive to market conditions and program participation assumptions, and stochastic analysis indicates that farm program costs could easily differ from expected values by $5 billion or more in any given year. By replacing direct payments with new policies that make payments tied to market prices and yields, the bill could have important World Trade Organization (WTO) implications. If the new policies are classified as non‐commodity specific amber box support, projections indicate that existing WTO limits on the current Aggregate Measure of Support would not be exceeded on average, but could be under some market conditions. Furthermore, the new policies are very likely to exceed some WTO rules proposed by various parties in the Doha Round negotiations.