Met 2212 Multivartate Statistics HoTesting OLSregression LISREL IS
- Slides: 30
Met 2212 - Multivartate Statistics Ho-Testing OLS-regression LISREL IS GREEK TO ME The SEM model LISREL SOFTWARE Ulf H. Olsson Professor of Statistics
THE LISREL MODEL Ulf H. Olsson
THE LISREL MODEL Branch Loan Satisfaction Loyalty Savings Ulf H. Olsson
THE LISREL MODEL Ulf H. Olsson
THE LISREL MODEL (Factor Model) Ulf H. Olsson
THE LISREL MODEL (Factor Model) Ulf H. Olsson
THE LISREL MODEL Ulf H. Olsson
THE LISREL MODEL Ulf H. Olsson
THE LISREL MODEL Ulf H. Olsson
Greek Letters CAP / low er Name & Description • C A P ALPHA (AL-fuh) First letter of the Greek alphabet. / l BETA (BAY-tuh) o w e GAMMA (GAM-uh) r • N a DELTA (DEL-tuh) m e EPSILON (EP-sil-on) The second form of the lower case epsilon is used as the “set membership” symbol. & D e Ulf H. Olsson s c
Greek Letters ZETA (ZAY-tuh) ETA (AY-tuh) THETA (THAY-tuh) IOTA (eye-OH-tuh) KAPPA (KAP-uh) Ulf H. Olsson
Greek Letters LAMBDA (LAM-duh) MU (MYOO) NU (NOO) XI (KS-EYE) OMICRON (OM-i-KRON) Rarely used because it looks like an ‘o. ’ Ulf H. Olsson
Greek Letters PI (PIE) RHO (ROW) SIGMA (SIG-muh) TAU (TAU) Ulf H. Olsson
Greek Letters UPSILON (OOP-si-LON) PHI (FEE) The two versions of lower-case Phi are used interchangeably. CHI (K-EYE) PSI (SIGH) OMEGA (oh-MAY-guh) Last letter of the Greek alphabet. Ulf H. Olsson
Parameter Function Ulf H. Olsson
Multivariate Normal Distribution Ulf H. Olsson
The Maximum Likelihood Estimator Ulf H. Olsson
Measurement Error in Linear Multiple Regression Models • Ulf H Olsson • Professor Dep. Of Economics
The stadard linear multiple regression Model Ulf H. Olsson
Measurement Error/Errors-in-variables Ulf H. Olsson
The consequences of neglecting the measurent error Ulf H. Olsson
The consequences of neglecting the measurent error • The probability limits of the two estimators when there is measurement error present: • The disturbance term shares a stochastic term (V) with the regressor matrix • => u is correlated with X and hence E(u|X) 0 Ulf H. Olsson
The consequences of neglecting the measurent error • Lack of orthogonality – crucial assumption underlying the use of OLS is violated ! Ulf H. Olsson
The consequences of neglecting the measurent error • The inconsistency of b Ulf H. Olsson
The consequences of neglecting the measurent error • The inconsistency of b Ulf H. Olsson
The consequences of neglecting the measurent error • The inconsistency of b • Bias towards zero (attenuation) for g=1 • In multiple regression context things are less clear cut. Not all estimates are necessarilly biased towards zero, but there is an overall attenuation effect. Ulf H. Olsson
The consequences of neglecting the measurent error • In the limit we find: Ulf H. Olsson
The consequences of neglecting the measurent error • The estimator is biased upward Ulf H. Olsson
The consequences of neglecting the measurent error Ulf H. Olsson
The consequences of neglecting the measurent error Ulf H. Olsson
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