IRIS Toolbox Reference Manual

## {...}

Lag or lead

#### Syntax

    VARIABLE_NAME{-lag}
    VARIABLE_NAME{lead}
    VARIABLE_NAME{+lead}

#### Description

To create a lag or a lead of a variable, use a pair of curly brackets.

#### Example

    !transition_equations
        x = rho*x{-1} + epsilon_x;
        pi = 1/2*pie{-1} + 1/2*pie{1} + gamma*y + epsilon_pi;

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