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Topic Presented By Interpretation Parsons Brickerhoff Rajesh Paleti.

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Presentation on theme: "Topic Presented By Interpretation Parsons Brickerhoff Rajesh Paleti."— Presentation transcript:

1

2 Topic Presented By Interpretation Parsons Brickerhoff Rajesh Paleti

3 On Choice Modeling: A TRB Web Video Resource Important Specification Issues Only differences in the utilities matter Not possible to estimate all alternate specific constants and all parameters on decision maker characteristics Solution: Choose a base or reference alternative Can be arbitrary and does not affect model quality

4 On Choice Modeling: A TRB Web Video Resource 3 Binary Choice Models: Empirical Specification and Interpretation: Model 1

5 On Choice Modeling: A TRB Web Video Resource 4 Binary Choice Models: Empirical Specification and Interpretation: Model 2

6 On Choice Modeling: A TRB Web Video Resource 5 Binary Choice Models: Marginal Effects Marginal effects: The change in the probability that decision maker n chooses alternative i in response to changes in explanatory variables, x in j; TR i; DA Marginal self effect; MSE Marginal cross effect; MCE

7 On Choice Modeling: A TRB Web Video Resource 6 Binary Choice Models: Elasticity Effects Elasticity effects: Percentage change in the response variable with respect to one- percent change in another variable Self elasticity Cross elasticity

8 On Choice Modeling: A TRB Web Video Resource 7 Binary Choice Models: Aggregate Effects

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