RDP 2005-08: Declining Output Volatility: What Role for Structural Change? Equation (1)

σ i t Y = β t X i t 1 + β 2 Z i t + β 3 W t + α i + ε i t for i = 1 , 2 , ... , 20 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaqbaeqabeGaaa qaaiabeo8aZnaaDaaaleaacaWGPbGaamiDaaqaaiaadMfaaaGccqGH 9aqpcqaHYoGydaWgaaWcbaGaamiDaaqabaGccaWGybWaaSbaaSqaai aadMgacaWG0baccaGae8NeI0IaaGymaaqabaGccqGHRaWkcqaHYoGy daWgaaWcbaGaaGOmaaqabaGccaWGAbWaaSbaaSqaaiaadMgacaWG0b aabeaakiabgUcaRiabek7aInaaBaaaleaacaaIZaaabeaakiaadEfa daWgaaWcbaGaamiDaaqabaGccqGHRaWkcqaHXoqydaWgaaWcbaGaam yAaaqabaGccqGHRaWkcqaH1oqzdaWgaaWcbaGaamyAaiaadshaaeqa aaGcbaacbaGaa4Nzaiaa+9gacaGFYbGaaGPaVlaadMgacqGH9aqpca aIXaGaaiilaiaaikdacaGGSaGaaiOlaiaac6cacaGGUaGaaiilaiaa ikdacaaIWaaaaaaa@64DC@