NYSE.DES price return return_1 t price_1 price_2 cprice cprice_1 Obs: 691 1. price NYSE stock price index 2. return 100*(p - p(-1])/p(-1)) 3. return_1 lagged return 4. t time trend: 1 to 691 5. price_1 price(-1) 6. price_2 price(-2) 7. cprice price - price_1 8. cprice_1 cprice(-1)