# RDP 9601: Why Does the Australian Dollar Move so Closely with the Terms of Trade? Equation (C2)

$$to{t}_{t}=a+bt+{\displaystyle \sum _{i=1}^{5}{c}_{i}to{t}_{t-i}+{\epsilon}_{1,t}}$$

$$to{t}_{t}=a+bt+{\displaystyle \sum _{i=1}^{5}{c}_{i}to{t}_{t-i}+{\epsilon}_{1,t}}$$