3. The difference-in-differences estimator I Suppose a new policy was implemented in the state of Ohio in 2007 that greatly reduced the cost of filing for a divorce, both in terms of monetary fees and paperwork. In the neighboring state of Pennsylvania, suppose the cost of filing for divorce has not changed from before 2007 to after 2007. You have collected two cross sections of divorce data from the years 2005 and 2009, for a random set of counties in both states. Suppose you propose the following regression model, with no additional factors controlled for, to study how the new policy has influenced the number of divorces in the treatment group (the state of Ohio) versus the control group (the state of Pennsylvania):

Q: How many even 3-digit numbers can be formed from the digits 1, 3, 4, 8, and 9 with no repetitions…

A: Out of the total 5 digits 1, 3, 4, 8 and 9 given, the even digits are 4 and 8. For the 3- digit…

Q: factors of 24 that add up to 10

A: factors of 24 that add up to 10

Q: 4 2 G F -8 -4 -2 2 10 -2 -4 E 10 K 00

A: Formula for area is length multiply by breadth. Similarly for square its a^2 if side of square is…

Q: How many ordered triples of letters are there taken from the letters A, T, C, and G?

A: given letters: A,T,C and Gtotal number of letters = 4

Q: correlation coefficient r is a sample statistic

A: Correlation: It is the extent of linear Relation between the two components. Given x= age of a…

Q: 10 8/10 + 9 7/12=

A:

Q: 4. Determine (16-912) dt c4

A: We will solve the problem.

Q: 7 items chosen 5 at a time

A:

Q: 7/2 + 3 4/6

A:

Q: Express the graph in Figure Q3(a) in terms of a unit step function and then find the Laplace…

A: We have to find the Laplace transform of given graph in term of unit step function

Q: Prove that the number of partitions of n into at most k parts is equal to that of partitions of n +…

A: given , number of partitions of n into k parts  we have to prove that , partitions of number n + k…

Q: 2

A: The Laplace inverse can be found by splitting the expression into three parts as it have power of 3…

Q: 9/12+3/24

A:

Q: 20/5+5+2*8

A: Consider the given expression

Q: Reduce the following to the lowest terms. Show how to calculate the greatest common divisor by the…

A: The given fraction number is,Here we can write,As we can see the number 4 can be canceled out.This…

Q: factors of 20 that add up to 9

A:

Q: ne binomial:

A:

Q: 42. The term that does not contain x in the expansion of 8x +

A:

Q: 10. Find the sum of the coefficients of (2x– 3)°. c. -6560 d. -5120 а. -5660 b. -6780

A:

Q: 1/5 + 1/10 + 1/15

A: Sum of numbers

Q: 5. Find the coefficient of a¹¹b4 in the expansion of (a + b)¹5.

A:

Q: 5 2/5+ n= 75/6

A: Given query is to find the value of n.

Q: Find A.

A: Given

Q: 4 1/2 +6 1/5=

A: We have

Q: (5/6)3

A: Cube means multiplying three times:   563=56×56×56=5×5×56×6×6=5363=125216

Q: 22 7/8 - 7=

A: Given,

Q: randomly drawing three green skittles in a row from a bag that contains eight green skittles out of…

A: Given that a bag contains 25 skittles in which eight are green. Three green skittles are drawn from…

Q: How many different ways could you choose any 4 gumballs from the 25 gumballs in the…

A: We can choose 4 gumballs from the 25 gumballs in 25C4 ways.

Q: The expansion of 500P3 is

A: 500P3 is a permutation term that gives the number of ways of arranging different combinations of…