Simple random walk: a Stochastic Process where
P(X_t = X_{t+1} - 1) &= 1- p \end{align}$$ i.e. it goes up with probability $p$, and down with probability $1-p$Simple random walk: a Stochastic Process where
P(X_t = X_{t+1} - 1) &= 1- p \end{align}$$ i.e. it goes up with probability $p$, and down with probability $1-p$