Consider a family saving function for the population of all families in the United States: sav 5 b0 1 b1inc 1 b2hhsize 1 b3educ 1 b4age 1 u, where hhsize is household size, educ is years of education of the household head, and age is age of the household head. Assume that E1u/inc, hhsize, educ, age2 5 0. (i) Suppose that the sample includes only families whose head is over 25 years old. If we use OLS on such a sample, do we get unbiased estimators of the bj? Explain. (ii) Now, suppose our sample includes only married couples without children. Can we estimate all of the parameters in the saving equation? Which ones can we estimate? (iii) Suppose we exclude from our sample families that save more than $25,000 per year. Does OLS produce consistent estimators of the bj?

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)

the answer i believe is 27 units.

step-by-step explanation: