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m a processThe m https://oneonlineco.com/step-by-step-guide-to-choosing-a-virtual-data-room-in-2024/ a process, also known as MA(q), is the general finite-order procedure that happens to be an autoregressive representation of a stationary series. It is stationary in the sense that the current conditionsal expectations are dependent on a function of the current and lagged shocks. This function is called the partial autocorrelation function.
MA(q) MA(q) is not an unique MA polynomial, which is different from AR processes. In fact, there are many possible MA(q) polynomials called lag operator polynomials that could be stationary and possess the same asymptotic characteristics.
In order to ensure that the process is causal in nature, it is common practice to impose invertibility constraints on the MA polynomial. This ensures that events from the past (and not future ones) are the only ones that can be predicted by the current events.