First, mathematical models developed based on different characteristics: type of parameters (deterministic, probabilistic or stochastic), number and type of objective function, numbers of commodity and modes, relocation time, number of relocation and relocating facilities, time horizon, budget and capacity constraints and their applicability.
The number of commodities in which futures trading takes place are far fewer outside the United States.
Other Transactions The Act also creates a broad exclusion for a number of commodities that are of interest to Enron, including "credit risk measure" commodities and weather derivatives.
"Enron, for example, was involved in a significant number of commodities that were not necessarily very liquid -- coal, metals," he said.
Engineered nanomaterials (ENMs) form the basis of a great number of commodities that are used in several areas including energy, coatings, electronics, medicine, chemicals and catalysts, among others.
The research is unique in terms of the scale of the data collection effort (number of commodities and interviews) and in its scope (multi-tier networks).
With those scarcities came price increases, and chronic shortages were reported in a number of commodities, including detergents, soaps, and paper products.
The number of commodities included in the U.S. index has expanded from 250 when the index was started in 1902 to about 2,400 in the late 20th century.
In the US, for example, the Commodity Futures Trading Commission is facing a legal battle over its attempts to impose "position limits", constraining the share of the market single investors can hold in a number of commodities, including corn and cocoa.
Using new tests constructed within a more general heteroskedastic fractionally integrated model we are able to find a body of evidence in support of the efficient market hypothesis for a number of commodities.
