Define, using your own words, the following concepts. a. Instrumental variable
b. Exclusion restriction
c. Conditional mean independence
d. Parallel trends (in the context of Difference in Differences)
e. Fixed effects.

Suppose your rich uncle gave you $50,000, which you plan to use for graduate school. you will make the investment now, you expect to earn an annual return of 6%, and you will make 4 equal annual withdrawals, beginning 1 year from today. under these conditions, how large would each withdrawal be so there would be no funds remaining in the account after the 4th?

Concrete consulting co. has the following accounts in its ledger: cash; accounts receivable; supplies; office equipment; accounts payable; jason payne, capital; jason payne, drawing; fees earned; rent expense; advertising expense; utilities expense; miscellaneous expense. transactions oct. 1 paid rent for the month, $3,600. 3 paid advertising expense, $1,200. 5 paid cash for supplies, $750. 6 purchased office equipment on account, $8,000. 10 received cash from customers on account, $14,800. 15 paid creditors on account, $7,110. 27 paid cash for miscellaneous expenses, $400. 30 paid telephone bill (utility expense) for the month, $250. 31 fees earned and billed to customers for the month, $33,100. 31 paid electricity bill (utility expense) for the month, $1,050. 31 withdrew cash for personal use, $2,500. journalize the following selected transactions for october 2019 in a two-column journal. refer to the chart of accounts for exact wording of account titles

Aminor has the legal right to repudiate