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Econometrics I > Week 1 > Flashcards

Week 1 Flashcards

1
Q

What are the different data types?

A
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2
Q

Give examples of the 3 different data types?

A
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3
Q

What is the linear regression model

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4
Q

What is the population regression line?

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5
Q

What is the error term?

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6
Q

What is the interpretation of the beta1?

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7
Q

What is the interpretation of beta0?

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8
Q

What is the interpretation of the error term?

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9
Q

Why do you need OLS?

A
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10
Q

What is OLS? And what is the formula?

A

df

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11
Q

What is the goal of OLS?

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12
Q

MATH: derive the OLS estimator?

A
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13
Q

MATH: show that the b1 estimator is equal to r_xy * (s_y / s_x)

A
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14
Q

What is the sample covariance?

A
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15
Q

What is the sample variance?

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16
Q

What is the sample correlation coefficient?

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17
Q

MATH: derive the estimators of the regression through the origin?

A
18
Q

What is extrapolation?

A
19
Q

What is TSS?

A
20
Q

What is SSR?

A
21
Q

What is ESS?

A
22
Q

What is the formula for R^2?

A
23
Q

What is the interpretation of R^2?

A
24
Q

What does R^2=0 and =1 mean?

A
25
Q

Why do we have Y^(-^) = Y^(-)

A
26
Q

MATH: show that R^2=r_xy ^(2)

A
27
Q

What is the implication of R^2=r_xy ^(2)?

A
28
Q

What is the reason for this implication:
R^2=r_xy ^(2)

A
29
Q

MATH: derive the R^2 in regression through the origin?`

A
30
Q

What is the SER?

A
31
Q

When is SER optimal?

A

The smaller and further it lies from the standdsrd deviation s_y

32
Q

What is the formula of the SER?

A
33
Q

What is the difference between the SER and the R^2?

A
34
Q

What do the first order conditions imply?

A

Econometrics I (3 decks)

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