# Posts by economyst

Total # Posts: 1,118

**Statistics**

The probability of seeing the first 61 in a batch good and the last 3 defective is (.96)^61 * (.04)^3 = X Now then, count the number of ways a batch of 64 could have exactly 3 defectives. The formula for n-choose-c or 64-choose-3 is (n!/c!(n-c)!) (where ! means factorial). 64...

*February 4, 2008*

**economics**

First calculate the "weight" of each good -- that is the percentage of total expenditures spent on that good. In 2005, $100 are spent on apples, $100 on bananas, for a total of $200. The weight of apples is 0.50 In 2006, price of apples went up by 100%, price of ...

*February 3, 2008*

**Finance**

The guy wants to consume 30,000 in t=1, but has y=60,000. So, he could in t0, borrow amount L. Since he will need to pay interest, at 6%, on the borrowed amount. So he wants L*(1+.06) = 30000. Solve for L. -- this being the additional consumption in t0.

*February 2, 2008*

**Micro Economics**

take a shot. what do you think?

*February 1, 2008*

**Micro Economics**

take a shot. What do you think. Hint: what could a spread between short-term rates and long-term rates imply about what people see in the future.

*February 1, 2008*

**economics**

One important point to keep in mind: value of a currency is simply the price of that currency stated in terms of a different currency. For example, the value of a Euro is the number of Dollars it takes to purchase a Euro. And, equilibrium is determined by the intersection of ...

*February 1, 2008*

**Economics**

Hummmm. In a world of fixed, non-renewable (natural) resources, I would agree with your answer. However, I think you may have over-analyzed this problem/question. Further, your original question asked about capital goods. In general, one makes capital goods today so that one ...

*January 30, 2008*

**Economics**

see my post above.

*January 30, 2008*

**Economics**

If there is, in fact, no seasonal pattern, then the parameters on the dummies ought to be zero (or very close) and insignificant. So, yes, they should not affect the estimation. However, the dummies might be picking up something else besides seasonal variations. Unless you ...

*January 29, 2008*

**home economics**

It would be represented as a point (or possibly a curve) inside the PPF.

*January 29, 2008*

**statistics**

I get: u=.66666667 ss=8 v=1 sd=1 Note that I am using the formula for the estimate of the variance from a sample. So, I devide by n-1.

*January 29, 2008*

**math**

huh?

*January 29, 2008*

**math-statistics**

I or others will be glad to critique your answer. But first, you must let us know what your answer is.

*January 29, 2008*

**Economics**

Currently the measure of GNP excludes imports but includes exports

*January 21, 2008*

**economics**

I do not understand your question: Are you asking about what shifts the supply and demand curves for American Autos? Are you seeking elasticity estimates of supply and demand?

*January 20, 2008*

**economic**

How bout air pollution?

*January 18, 2008*

**economics**

False. The production possibilities frontier (ppf) shows the maximum possible production when all resources are used efficiently. So, hiring unemployed workers should have no effect on the PPF. However, acquiring new workers through, say births or immigration, would increase ...

*January 15, 2008*

**Finance**

This is a question that could easily be answered by the Federal Reserve's Survey of Consumer Finance. (The survey is a publically available micro-data file) Unfortunately, I do not know if your particular desired statistic has been tabulated and published by the Fed/SCF. I...

*January 12, 2008*

**economic**

Think it through. If you understand what a ppf curve represents, then aha, it must be downward sloping. What condition(s) must be true if the ppf is a straight line?

*January 11, 2008*

**investment**

Ah, but remember, the expected $100 is 3 years hence. Is $75 compounded over 3 years at 10% greater than 100?

*January 10, 2008*

**economics**

Good question. Think it through, then take a shot. Hint: Person A obviously values the concert itself at $5 or more (he voluntary traded a $5 bill for a ticket). How much does person B value his ticket?? And, can you say anything about each person's aversion (or additional...

*January 10, 2008*

**finance management**

yes. But be sure to compound he interest.

*January 10, 2008*

**finance management**

Take a shot. What do you think?

*January 10, 2008*

**finance management**

In year 0, he has B0=42,180.53 In year 1, he has B1=B0*1.12 + 5000. In year 2, he has B2=B1*1.12 + 5000. Continue until Bn >= 250000.

*January 10, 2008*

**finance management**

An Excel spreadsheet is very good for these types of problems.

*January 10, 2008*

**finance management**

The short-cut method is to use the Rule of 72. That is 72/rate = time needed for investment to double. So, 72/6.5 = 11.08 years Or you could do in more precisely by compounding an investment by 6.5% until it doubles.

*January 10, 2008*

**Personal Finance**

An excel spreadsheet would be very helpful for this kind of problem. Set up a month-by-month income, expenditure, and net savings rows. See if problems arise.

*January 9, 2008*

**Marketing**

You probably already know the general answer. Direct your advertising to high school seniors or parents of high school seniors. Advertise near graduation time. Emphasize accomplishment.

*January 7, 2008*

**Human Resource Management**

As a suggestion, think about how management would change in light of the changing technology that allows workers to tele-commute (i.e., work from home or, really, any location)

*January 4, 2008*

**Statistics**

I believe the answer is 'none of the above' The formula for the confidence interval is: P +or- Z(99) * sqrt(P*Q/n) P is the estimated probability of attendence = 750/1100 = .6818 Q = 1-P n = sample size = 1100 Z(99) is the number of standard deviations away from the ...

*December 19, 2007*

**STATISTICS**

First, relax 1) With your sample of 30, calculate the mean (average) travel time and the standard deviation. (I presume you know how to do these calculations). 2) Calculate the number of standard deviations that 45 minutes is away from the mean. That is X=(mean-45)/SD (mean ...

*December 16, 2007*

**economics**

An increase in demand is shown by the demand curve moving to the right.

*December 16, 2007*

**economics**

see my later post to your question

*December 16, 2007*

**economics**

If foreigners are buying more US goods, exports go up. Exports, being a component of aggregate demand, cause aggregate demand to increase -- shift right.

*December 13, 2007*

**economics**

Depends on who is buying the bonds. If the Fed, then no, if the public, then yes.

*December 13, 2007*

**economics**

I think it will move to the right

*December 12, 2007*

**Econ**

I think the answer is A. First, lets ask the question, What is the opportunity cost of money for the borrower. I think its the cost of OBTAINING money. The opportunity cost of getting a dollar today is having to pay a dollar plus interest next year. So, if interest rates rise...

*December 12, 2007*

**Microeconomics**

Take a shot. What do you think. Hints: The change in TVC is MC. The firm will maximize when P=MC

*December 11, 2007*

**economics vocab.**

1) I agree 2) I disagree. I would go with "unemployment rate" 3) I agree 4) I would go with "full employment" 5) I agree 6) I agree

*December 11, 2007*

**economics**

1) I would go with cyclical unemployment 2) I would go with frictional unemployment

*December 11, 2007*

**inflation**

Take a shot. What do you think?

*December 11, 2007*

**economics**

Hummm, why to the left? I would think aggregate demand is increasing which is represented by a shift to the right.

*December 10, 2007*

**economics**

Individual Income tax

*December 10, 2007*

**economics**

Assuming that the bond is a simple-interest bond..... In year 1, the bond pays 100*.04=$4. In year 2 the bond again pays $4. In each of the years 3,4, and 5 the bond pays $4. So, over 5 years, the bond pays..... (Note that some bonds pay compounding interest (the "...

*December 10, 2007*

**statistics**

I would have more confidence in the sales at the $55,000 expenditure level. Think it through, then take a shot.

*December 9, 2007*

**Statistics**

I think I see your issue. You are testing whether the male distribution fits the female distribution. So, treat the female distribution as the expected distribution (E), and the male distribution as the observed (O). (Chi squared) = sum[ (O-E)^2/E ] 10 degrees of freedom.

*December 9, 2007*

**Excel**

I think I see your problem. The IF function in excel is: @IF(logical test, value if true, value if false) So let column A be price, B be quantity, column C be receipts after discount. So for any sale (row i), put in the C columns cell row i: @IF (Bi >= 2, Ai*Bi*(1-$I$1), Ai...

*December 8, 2007*

**crossword puzzle**

well, if you are allowed to remove some letters, fortunateness would work

*December 6, 2007*

**economics**

Do a little research, then take a shot. Here is a web site that gives a good synopsis of the issue. http://en.wikipedia.org/wiki/Externality

*December 6, 2007*

**economics**

I would modify property rights to be intellectial or non-tangible property rights

*December 5, 2007*

**Microeconomics-Algebra Calculation**

You are very close. Check your arithmatic. To avoid confusion, I will use Pn to mean P2 (price in period 2) You have, as stated (Pn - 2)/((Pn + 2)/2) = 0.5 So, solve for Pn. First multiply numerator and denominator by 2/2 (=1). You get: (2Pn - 4) / (Pn + 2) = 0.5 Now multiply ...

*December 5, 2007*

**math**

scale: 40ft per 16 inches, or 40x12in/16in or 30 to 1.

*November 28, 2007*

**Religion**

Blue laws in the US marriage You can get a wealth of information on those.

*November 28, 2007*

**chemistry**

It is an organic acid, based on cyclic hydrocarbon structure, it is corrosive, covalent, and is used in derivative form in many cancer chemotherapy drugs. I have no idea what type of descriptor you were looking for.

*November 28, 2007*

**accounting**

Follow the simple annuity formula. (Google: annuity, formula for more information and explanations) P = B / ( (1 -(1/(1+i)^n) / i) where i= interest rate = .05 n = number of year = 20 B = initial balance = 300,000 hint: for P, I get 24,072.78

*November 27, 2007*

**Accounting question..**

Ok, you will need 4 items to plug into a formula for calculating the bond price. 1) cash flow (CF). The bond pays semi-annually. So, each payment is 400,000*(.07/2) = 14,000 2) yield rate or interest rate (i). The annual rate is given as 8%, so the semi-annual rate is 4%. 3) ...

*November 27, 2007*

**Math**

Yours is not really a math question but.... Most large business in the U.S. use what is termed the Modified Accelerated Cost Recovery System (MACRS). There are of course exceptions. Most importantly, small business can use the method referred to as Section 179 expensing.

*November 27, 2007*

**Probability**

Hannah. I believe you are correct. The answer by Im Not So Smart is clearly wrong.

*November 27, 2007*

**Public Administration / GOVT**

Hummmm, as I re-read your question, I have my doubts about the answer. According to Census data, school districts have the greatest number local-government employees. However, Im not sure which has the greatest number of ELECTED officials. I'll bet a census-of-governments ...

*November 26, 2007*

**Public Administration / GOVT**

Its not an easy question. And the answer is not obvious. The correct answer, according the Census bureau, is C. google your key words, find a link that points to allcounties dot org (sorry, I am not allowed to post links to websites)

*November 26, 2007*

**Calc w/ Business**

my bad. it's -4ac in the quadradic, not +4ac

*November 25, 2007*

**Calc w/ Business**

To find a maximum, set your marginal revenue (R') equal to zero. Now then, R' is a quadradic equation. So, use the quadradic formula. -b +- sqrt(b^2+4ac) / 2a

*November 25, 2007*

**Economics**

I suggest you google the following: economics, endogenous, defined In an economic model, endogenous variables are items that occur within the model, and are usually predicted by the model. So, in a business cycle model, the level of GDP or the change in GDP would be endogenous...

*November 25, 2007*

**Economics 260**

Wikipedia has a good explanation, and includes a graph over the common three stages of production. Go to Wikipedia and find: Production_function

*November 25, 2007*

**Math For Business**

You have: Max (.06*B + .12*G + .20*S) subject to: B+G+S = 90,000 G+S <= 22,500 G >= 15,000 You could set this up as a linear programming problem. However, getting to the optimal solution is obvious. G=15,000, S=7500, B=the remainder

*November 19, 2007*

**finance**

Think it through... If a quarter has approximately 90 days and purchases in 30 of those days, the payment will be in the following quarter, and for purchase in 60 of those 90 days, the payment will be made in the current quarter.... means?

*November 18, 2007*

**Economics**

If I were writing such an essay, I would first discuss the multitude of ways that technology has lowered transaction costs. I would discuss improvements in speed and reliability. Then I would try to work in something about Types of labor (jobs) being phased out. Types of ...

*November 18, 2007*

**MANAGERIAL FINANCE plz help!!**

Think it through, In Excel, calculate the present value of the income stream till age 60 under both options. A coupla a complications to think about. First, I personally would think that tuition costs ought to be paid for with borrowed money. So, I would add borrowing costs to...

*November 18, 2007*

**constitutional history**

Go to Archives dot gov. There is a link to a history of the declaration of independence. BTW, the site contains the following sentence: "Timothy Matlack was probably the engrosser of the Declaration." Not exactly a female name, but there you have it.

*November 15, 2007*

**Economics**

What is a PAE equation. (if PAE refers to Post-Autistic Economics, then I am afraid you are dealing with a new area of econ which I am unfamiliar with)

*November 15, 2007*

**Economic**

Do some research, then take a shot. What do you think?

*November 14, 2007*

**economics**

Start by drawing supply and demand curves and solve for an equilibrium price and quantity. Now draw in the quota. Dead weight loss will be the triangle area which is: a) to the right of the quota b) under demand, and c) above supply you may need to use some basic algebra/...

*November 14, 2007*

**Economics**

see my post to jennifer (just below this post) for a good hint on how to solve this problem. Repost if you have questions.

*November 14, 2007*

**economics**

Drawing a picture would help. A normal monopolist would set MC=MR. Under this example, optimal Q=80, thus P=60. Total revenue is 80*60=4800. Total cost (represented by the area under MC between 0 and 80) is 80*20=1600. So, profit = 3200. For the perfect price discriminator, ...

*November 14, 2007*

**economics**

The industry supply curve could be written as Q = 500+50P Alternative, using some algebra, industry supply curve is also: P = Q/50-10 (where Q = industry supply) Check it out, solve for P when 500 + 50P = 1500-50P (my bad, I used a big Q instead of a small q in my original post.

*November 14, 2007*

**economics**

Yesterday, a person under the user-name of "timmy" posted a very similiar question. Questions a and b were addressed in that post. c) You are given the short run MC curve. AC is simply TC divided by Q. So, SAC = .5Q - 10 + 200/Q To find the minimum, take the first ...

*November 14, 2007*

**economics**

Yes, you are on the right track. You have the equilibrium price, P=10. At P=10, average revenue must also be 10. Average cost is 10, so profits are zero.

*November 13, 2007*

**economics**

With identical cost structures, the firms, in the long run, will all end up producing where the AC is minimized. So, P=10, plug this into the demand equation to get total Q. Take it from here

*November 13, 2007*

**microeconomics**

I hope I gave you enough information in your latter post. Repost if you need more help. Question: does qi mean "quantity produced by firm i"?

*November 13, 2007*

**Managerial Economics**

Do a little research, then take a shot. Hint: draw a picture; the MC must cut the AC curve a the minimum point of the AC curve.

*November 12, 2007*

**Microeconomics**

6a) With shrinking beef consumption, which beef production operations (including ranchers, and meat packagers) will be shut-down? The high-cost producers or the low-cost producers? I would go with 'yes', marginal costs will be lower. b) I agree. 9a) In a competitive ...

*November 8, 2007*

**statistics**

What is an honor card? If an honor card is a face card (J,Q,K), then there are 12 honor (face) cards in a deck. So a)=1/12 For b) there are 20 numbered cards that are even. There are 2 red fours, So, b)=2/20

*November 6, 2007*

**statistics**

Hummm, I do not agree with your answers a-d. a) given that a diamond was turned, it must have been an ace or king. So for a) I get 1/2. b) given that a club was turned, it must have been a king. So for b) I get a zero probability. Now then, notationally, does P(A/C) mean ...

*November 6, 2007*

**Business**

Generally NO, tariffs do not help maintain a favorable balance of trade. Tarriffs are a tax on goods coming in (imports). They do not affect, directly, goods going out (exports). Take it from here.

*November 6, 2007*

**math - statistics**

Take a shot. What do you think. Hint: an Excel spreadsheet is very helpful for these types of problems.

*November 5, 2007*

**Finance**

An excel spreadsheet is very handy for these types of analyses. I'll do the first one, which should give you a process for working the second. First calculate the net present value for the cash flows for years 0 to 10. 0 = -100000/(1.08^0) = -100000 1 = 0 2 = 0 3 = 16000/(...

*November 4, 2007*

**micro_economics**

I agree with Ms Sue's Answer. That said, the theory of the Oligopoly is a complicated one. With a oligopoly, the possibility of collusion exists, even if it is not explicitly observed. That is, the firms have agreed, well in advance, that whenever one firm changes it's...

*November 4, 2007*

**micro economics**

I am confused by "$60 a minute". Could you mean fixed cost is simply $60. Let me assume just that. Fixed cost=$60. So, when output=1, then total cost = 10+60=70, marginal cost = 10, AFC=60/1=60 AVC=10/1=10 ATC=70/1=70 When output=2, (assuming MC=10) then Total cost...

*November 4, 2007*

**economics**

a) the short-run supply for each maker is their MC curve, The supply curve for the industry is the sum of the supply curves from each firm dis-regarding the constant, so... supply = 100q+10 b) given your demand equation, there is no equilibrium value with a positive production...

*November 3, 2007*

**Economics**

For this and your other questions, do a little research, then take a shot. What do you think? I or other will critique your answers.

*November 2, 2007*

**Statistics- quick! Is this right?**

1) looks correct For 2) You have an standard error of 500, and are asked what is likelihood of similar sample being within 1000 or 2.0 standard deviations away from the mean. Look up 2.0 in your cumulative normal distribution table (probably in the back of your stats book). I ...

*November 1, 2007*

**Economics**

Always always always where MC=MR With your givens, I must assume that MC=AVC=20 at one PARTICULAR PRODUCTION LEVEL, and MC=ATC=30 at another PARTICULAR PRODUCTION LEVEL. Both statements cannot be true at the same production. So, I presume that the firm has a normal increasing ...

*October 31, 2007*

**Stats**

Take a shot. What do you think.

*October 31, 2007*

**Stats**

Take a shot. What do you think. Show some work.

*October 31, 2007*

**STATISTICS**

This is a binominal distribution -- either the car has problems or it doesnt. With n=128, the expected mean number with problems is .14*128=17.92 The standard deviation is sqrt(p*q*n) = sqrt(.14*.86*128) = 3.9 .18*128=23.04, which is 5.12 above the mean or 5.12/3.9=1.31 ...

*October 30, 2007*

**economics**

a) when output is 2, from your table, total fixed costs are $5 and total variable costs are $27. Simple arithmatic. b) marginal cost is the change in cost from a marginal (e.g., 1 unit) change in production. c) always always always, profit is maximized when marginal cost=...

*October 29, 2007*

**economics**

I would argue that cotton is also a variable cost. The amount of raw cotton the mill buys should be in direct proportion to the level of output.

*October 29, 2007*

**Economics**

Marginal revenue is also known as Price (P). So, in rich countries MR=80. If it serves the poor countries MR=30. If it serves the poor countries with a goal of 6-million treatment and since it cannot prevent re-sale, price (MR) in the rich country also drops to 30. Now then, ...

*October 29, 2007*

**ECON, HELP?!?**

Your prof's answers are initial responses to the change from taxes. With a $100B increase in taxes, INITIALLY, 60B would come out of consumption and 40B out of savings-- b) private savings falls by $40B. c) National savings is sum of public+private savings = +100B-40B = ...

*October 27, 2007*

**econ, help???**

Your prof's answers are initial responses to the change from taxes. With a $100B increase in taxes, INITIALLY, 60B would come out of consumption and 40B out of savings-- b) private savings falls by $40B. c) National savings is sum of public+private savings = +100B-40B = ...

*October 27, 2007*