Some classes of variables can be lagged; that is, their value at each observation is remembered, and previous values can be referred to by the lagging functions. Other classes have only a single value ...

If you have ever solved a linear programming problem, you may have encountered the concept of dual variables. These are values that are associated with the constraints of the problem, and they ...

In programming, a variable is a container (storage area) to hold data. To indicate the storage area, each variable should be given a unique name (identifier). Variable names are just the symbolic ...

Programming statements are used to create or modify the values of the explanatory variables in the MODEL statement. They are especially useful in fitting models with time-dependent explanatory ...

Environment variables don't belong to a single program, they exist inside the shell (your terminal session). This command prints a list of environment variables specific to this shell. We'll see ...

Multi-stochastic variable programming (MSVP) is an important tool to solve the decision-making problem with multiple random variables. However, when there are a large number of nonlinear constraints ...