# Posts by economyst

Total # Posts: 1,118

**economics**

Is there a question here?

*February 28, 2010*

**11th grade economics**

In economics "captial" generally means one of two things. First is physical capital which is, as you state, a means of production e.g., machinery. The second is financial capital e.g., cash. Now then, it is a bit easier to relate financial capital to interest income...

*February 15, 2010*

**consumer math**

1) 200*34.5*(1.01) = 2) 13459*(1.0675) =

*February 4, 2010*

**Statistics**

The probability of not hitting oil is .8 The probability of not hitting oil in 5 tries is .8^5 = .32768. Ergo, the probability of getting at least 1 hit is (1-.32768) = .67232

*February 3, 2010*

**economics**

I presume you can determine the price the monopolist will charge. (hint: MR=100-2Q, MC=10) Draw a graph showing the demand line, the MC line, the MR line, the maximizing price and quantity. Consumer surplus will be the triangle area below demand but above price. Producer ...

*February 3, 2010*

**Business Math and Statistics**

I'm having trouble coming up with a "common" circumstance example of why a firm would purchase an annuity. Annuities generally lose their liquidity. The most common reason why a firm would hold a pile of cash is to have cash reserves -- to pay for unexpected events.

*February 3, 2010*

**statistics**

There are a number of ways to solve this problem. Here is one. The standard deviation of a binominal is sqrt(n*p*q) where p is the probability of an event and q is 1-p. So, SD = sqrt(25*.38*.62) = 2.427 The expected number that 6 hours or less is .38*25 = 9.5. Now then (14-9.5...

*February 3, 2010*

**taxes**

If the $1892 was earned income (e.g., wages), the person would likely receive a hefty $757 earned income tax credit, which would be included in any "refund" check the person would otherwise receive.

*February 3, 2010*

**Microeconomics**

ATC should be equal to $4 under the conditions you state

*February 3, 2010*

**economics**

I don't understand your demand equations. You state the demand for text books is: m 2py Could you elaborate and explain your terms? I would expect the demand function for text books to be some function of the price of text books and income. Regardless, the questions you ...

*February 2, 2010*

**Finance**

At .1 per pound, the variable cost per bag is $5. Let n be the number of bags at break-even. So Tota revenue is 10*n. Total costs are 80000+5*n. Break-even is 10*n = 80000 + 5*n -- use algebra and solve for n.

*January 5, 2010*

**microeconomics**

then potentially a lot of things. 1) The industry is perfectly competitive (or nearly so) 2) Implying that no single firm has a "large" market share. 3) Implying that each firm in the industry produces a product that is not distinguished (different) than any other ...

*January 5, 2010*

**probability**

How bout "from this group of 550+300+850=1700 students"?? Assumeing that you meant 1700 students, there are 400 from School A that took the bus. Ergo, P=400/1700 = 23.5%

*January 5, 2010*

**12grade economics**

I beg to differ. For a 20% increase in revenue to occur, people would need to purchase the same physical amounts of taxable goods and services they previously did and actually spend 1% more. This is unlikely because 1) with the effective higher prices, and a fixed budget ...

*January 5, 2010*

**managerial economics**

Lets start with the assumption that the firm, prior to the settlement, was operating at a profit-maximizing level; where Marginal Costs=Marginal Revenues. From the information, the firm must have some monopoly power. it sets a price above MC, and is operating in an elastic ...

*December 21, 2009*

**macroeconomics**

Do a little research, then take a shot. What do you think? Hint: Be sure to understand import substitution policies vs export promotion policies. Hint2. How will foreign countries respond to such policies?

*December 21, 2009*

**Macroeconomics**

Do a little research, then take a shot. What do you think? Hint: simply understanding how a fixed exchange rate differs from a floating rate should answer most of your questions.

*December 21, 2009*

**Managerial Economics**

I don't understand why total fixed costs should ever be a major component to a calculation that should be made on the margin. The question is simple, does the expected additional revenues (MR) from the added sales force exceed the expected labor costs (MC) from the added ...

*December 20, 2009*

**Managerial Economics (bobpursely please help)**

see my post above.

*December 20, 2009*

**Managerial Economics**

See my post above.

*December 20, 2009*

**Managerial Economics**

see my post above.

*December 20, 2009*

**DataManagement**

Excek spreadsheets are very helpful for these kinds of problem. a) the probability of selecting a female is .3*.4 + .5*.5 + .2*.5 = .47. Ergo, the probability of picking a male is .53. The probability of picking all males is .53^50 = something really small. for n males it (50-...

*December 17, 2009*

**economics**

Because leisure is a normal good. If you cut income taxes, then the after-tax income for each hour worked goes up. This effect alone should cause a person to want to work more. This is the direct substitution effect labor-for-leisure. However, leisure is a desireable thing. ...

*December 14, 2009*

**Managerial Economics**

So, I take it, this is a two-by-two table. The rows are Indian River and Interior. The columns are also Indian River and Interior. What are the values in the tables? That is, what do they measure or represent??

*December 14, 2009*

**Managerial Economics**

I'm having mucho trouble here. I need to see the table to see what is going on.

*December 14, 2009*

**Macroeconomics - NX & Tax**

In the long run, in an open economy, imports=exports. If a country limits imports but continues to export, then goods are flowing out and foreign currency flows in. What good is that foreign currency if the holders cant buy anything with it? (Think about it, if imports are ...

*December 14, 2009*

**Macroeconomics - SOE**

Let me elaborate with an example. Say something costs 2 euros and the euros to dollars ratio is 1. So, I need 2 dollars to purchase. (I take my 2 dollars to the exchange, and get 2 euros). Now let the euros/dollars exchange ratio drop to 0.5 NOW, I need to spend 4 dollars to ...

*December 14, 2009*

**Macroeconomics - SOE**

I think of the exchange rate as the number of a foreign currency units per dollar. e.g., euros/dollars. From this perspective, the statement makes perfect sense.

*December 14, 2009*

**macroeconomics**

The Phillips curve plotted inflation against unemployment. So two correct answers: low inflation/unemployment or low unemployment/inflation

*December 13, 2009*

**Business Statistics**

First, calculate the mean (average) number days lost. The deviation, for any observation, is the difference between the observed value and the mean.

*December 13, 2009*

**macroeconomics**

do a little research, then take a shot. What do you think? Hint: think about what money is and can do for you. Physically, money (cept coins) is nothing more than a printed piece of paper

*December 13, 2009*

**macroeconomics**

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

*December 13, 2009*

**macroeconomics**

Take a shot, what do you think? Hint: just use common sense to answer this one.

*December 13, 2009*

**macroeconomics**

Do a little research, then take a shot. What do you think? Hint: be sure to read up on the money multiplier.

*December 13, 2009*

**economics**

Do a little research, then take a shot. what do you think. Hint. Be sure to read up on Monetarists, and the quantity theory of money.

*December 13, 2009*

**Managerial Economics**

Dell, HP, and Gateway largely build PCs which run on Microsoft, while Apple has its own operating system. So, HP and Gateway PCs are much closer substitutes for Dell PCs

*December 11, 2009*

**Microeconomics - Pareto Efficient**

I think your first sentence is right. However, your reasoning is a bit off-base. Pareto-efficient implies that people with a marginal benefit above the marginal cost of producing the good can purchase that good. The above reasons you gave for deadweight losses also imply some ...

*December 11, 2009*

**Microeconomics - Normative Statements**

I'm not sure what you are asking. That said, in cost-benefit analysis doesnt necessarily mean if one gains someone else must lose. A coomon social policy question asks whether some change in policy is a good idea or not. Under a pure pareto requirement you would have to ...

*December 11, 2009*

**macroeconomics**

Like some of your earlier posts, some critical information is missing. What is the price of a cart? and what is the useful life (in years) of a cart?

*December 10, 2009*

**macroeconomics**

a) put income on the x-axis, consumption (and savings) on the y-axis. At x=100 and y=150 put a dot. At x=200 and y=200 put another dot. Repeat for 300 and 400. Connect the dots. b) slope is rise over run. With each 100 increase in income (run), consumption goes up by 50 (rise...

*December 10, 2009*

**macroeconomics**

Savings = income - expenditures. So, for the first example savings =-50

*December 10, 2009*

**Macroeconomics**

Use the multiplier. a) 8*10=80, b) -5*10=-50 and c) 20*10=200 Again, Am I missing something, some part of the problem, here?

*December 10, 2009*

**Macroeconomics**

I have the feeling I am missing something. Are the questions referring to some graph which I don't see??

*December 10, 2009*

**Microeconomics - Oligopoly**

The two firms agree to act as a monopolist. Sinc MC is zero for both firms, they will produce where MC=MR=0 (where MR is the combined MR for both firms). And when MR=0, the elasticity of demand is -1. So b is true. Now at this optimal production point, each firm producing its ...

*December 10, 2009*

**economics**

I suspect there is something more to your question. The short, obvious answer is that output per worker increases.

*December 10, 2009*

**math**

Something is missing here. You don't present the estimated equation, only one observation. Plz re-check your problem and then repost if you are still having trouble.

*December 9, 2009*

**Economics**

In the UK it costs 6 cloth to get 2 wheat. Ergo, cost for 1 wheat is 3 cloth. In US it cost 5 cloth to get 1 wheat.

*December 9, 2009*

**Economics**

I don't know what "artifical supply creates artificial demand" means at all. A price ceiling that is below the otherwise equilibrium price creates a market shortage. (illustrate this on a supply-demand graph). I like your sentence about the black market. With ...

*December 8, 2009*

**probability**

Can you assume the probability of success is the same for everybody? Does success for 12 mean that each person was successful? If so. Let p=probablity of success for one person. Let x be the known probability of success for 12 people. So for 12 people p^12 = x. Take natural ...

*December 8, 2009*

**Managerial Economics**

Integrate the MC function. MC is the first derivitive of TC. So, TC = 10Q + (5/2)Q^2 + C

*December 8, 2009*

**economics**

Take a shot, what do you think? Hint: be sure to distinguish between economic profits and accounting profits.

*December 7, 2009*

**macro econ**

The firm makes an optimal input choice when the marginal product of one input divided by the price (wage) is equal the marginal product of any other input divided by the price (wage) of that other input. So for printers MP=20, P=20. So MP/P=1 For presses, MP=1000, P=5000. So, ...

*December 6, 2009*

**Prisoner's Dilemma**

I can think of some prisoner dilemma outcome sets that would lead to cooperative behavior C). But I think the most likely outcome in a more traditiona prisoner dilemma game is E) Both players, interested in their themselves, will rat out the other by confessing. Further, ...

*December 6, 2009*

**Economics (PPFs)**

The marginal rate of substitution, in this context, is the amount of additional K you need to hold production constant in because of a decrease in L. (or vice versa) MRS = -MPk/MPl. In the production of X, MPk = (1/2)K^(-1/2)*L^(1/2) MPl = 1/2)L^(-1/2)*K^(1/2) So, MPk/MPl = -L...

*December 6, 2009*

**Economics (Production Possibility Frontiers)**

I think it is line from (X=8.94, Y=0 to (X=0, Y=40). The line will be in a bow-shape. (I presume by: X = K1/2L1/2 means K and L are raised to the 1/2 power.) To see this, plot a graph. (Excel spreadsheets would be very helpful here).

*December 6, 2009*

**Economics/Statistics**

Because they are perfectly postively correlated, the covariance between the q and z is 1.00 Because, (while not explained or pointed out), the possible answers are expressed in percentage terms and the decimal point is moved over 2 places, the answer you seek is B.

*December 6, 2009*

**college/microeconomics**

First, derive a marginal revenue curve (like you did in your previous post.) So, P=50000, Q=1, TR=50000, MR=50000 P=40000, Q=2, TR=80000, MR=30000 P=30000, Q=3, TR=90000, MR=10000 and so on. b) he makes 3 cars, charges 30,000 each, and makes 10,000 profit. c) He makes 5 cars, ...

*December 6, 2009*

**college/microeconomics**

see my response to your earlier post.

*December 6, 2009*

**Microeconomics:**

Demand would simply be the relationship between price and quanty. E,.g, at P=18, Q=1. At P=2, Q=9.

*December 6, 2009*

**Economics**

Without insurance, Pete's expected utility is .9*sqrt(2*10000) + .1*sqrt(2*2500) = 134.3502884 utils So, what wealth give him equal amount of utility. Well, work the utility formula backwards. That is (134.3502884^2)/2 = 9025. Take it from here.

*December 5, 2009*

**Economics/Math**

You state that q and z are perfectly positively correlated. This alone says the covariance of q and z is 1. The rest of the information you provide is a red herring.

*December 5, 2009*

**Economics**

If she makes 20, she sells all 20 and makes 20 profit. If she makes 50 there is a .5 chance she sells all 50 and makes a 50 profit, and a .5 chance she sells 20, throws 30 in the trash and makes a 10 loss. Her expected profit is .5*50 + .5*(-10) = 20. Since the sure-thing of ...

*December 5, 2009*

**Economics/Math**

If you sold right now and put the money in the bank, after one year you would have 500*(1.05) = 525. After two years you would have 525*(1.05) = 551.25. So, assuming you get no enjoyment from looking at the painting, go with E)

*December 4, 2009*

**economics**

take a shot, what do you think? Hint: calculate the change in revenue from each 0.2 increase in advertising, subtract the marginal cost of producing that extra unit. (e.g., calculate the change in profit from each 0.2 increase in advertising). Keep increasing advertising until...

*December 4, 2009*

**economics**

If you are doing your dissertation, you must be well beyond anything we could offer. So, hows about joining the Jiskha crew and help mostly high-school level students with their homework?

*December 3, 2009*

**college microeconmics**

take a shot, what do you think. hints: Max profit occurs when MC=MR, break-even occurs when TC=TR.

*December 2, 2009*

**economics**

Take a shot. What do you think. Hint: think opportunity cost. What is the opportunity cost of holding the land and running a model on it?

*December 1, 2009*

**macro economics**

I need more information. What exactly are you trying to graph. What are you being asked to do. When I see income and substitute in the same sentence, I am thinking you are being asked to illustrate income and substitution effects on a demand curve. Correct?

*November 30, 2009*

**microecon**

I'm having a trouble with your notation. This Jiskha site has mucho trouble in expressing mathmatical equations. (where did your "f" come from?) That said, this is more of a calculus question. MR is the first derivitive of total revenue, so Pdq/da looks corret. ...

*November 30, 2009*

**math-probability**

if they each get one shot P=.50*.80*.75=.3 = 30%

*November 30, 2009*

**Economics**

Do a little research, then take a shot. What do you think? Hint: Maximize profit where MC=MR. In a perfectly competitive market MR=P. Hint2: the demand curve facing a firm in a perfectly competitive market is a horizontal line. (in economics terms: perfectly elastic)

*November 30, 2009*

**Economics**

Take a shot. what do you think?

*November 30, 2009*

**Probability again**

follow the basic methodology that Drwls showed you in the previous post. Assume each color ball can be distinguished from each other. (e.g., name the green balls g1 and g2) First, the denominator. How many different ways can 3 balls from 12 be chosen. 12-choose-3 is 12!/3!(12-...

*November 29, 2009*

**macro econ**

No, you are way off track. For utility maximization in spending on goods, you want the spend where the marginal utility per dollar is the highest. So, if MUx/Px is greater than MUy/Py then spend more on x and perhaps less on y. I presume your "10.00" is the price per...

*November 29, 2009*

**Economics**

I have no idea What is the question, and What does "5=(10,4)+40=(10,4)" mean.

*November 29, 2009*

**Statistics**

I too am confused. The FDA's tested mean is below their "standard" of 30.2. How could they possibly conclude the acutual mean above 30.2??

*November 28, 2009*

**Math**

There is no way these series could represent a linear equation. You have two different values for P -- 8 and 10. Yet both values have an associated Q of 110

*November 28, 2009*

**ECONOMICS**

do a little research, then take a shot. What do you think? Hint. Be sure to read up on the money multiplier.

*November 28, 2009*

**mangerial economics**

Take a shot, what do you think? Hint: On a graph, Consumer surplus is the area below the demand curve but above price. Compare the area using the Price the Monopolist would change to maximize his profits vs the price where P=MC. You will need to use some geometry.

*November 25, 2009*

**Microeconomics - Cournot**

a) I agree b) I agree c) Cournot models can be tricky beasts. But in this example, I believe the soulution is easy because 1) both firms have flat MC curves and MCx < MCz. I believe firm X, in the end, will drive P down to 6 and Z will produced nothing. (I wish I had more ...

*November 24, 2009*

**MACROeconomics - Game Theory**

I'm having some trouble with your notation. Let me asssume that (x,y) means that x is the outcome going to player A, y is the outcome going to player B. If top left is a dominant strategy equilibrium, it implies A perfers outcome Top and B prefers outcome Left. Ergo, I ...

*November 24, 2009*

**Managerial Economics**

See my previous post on calculating the optimal quantity, then price. Compare that to the competitive case where supply=demand or 850-2Q=250+4Q -- solve for Q.

*November 24, 2009*

**Managerial Economics**

Always always always, maximize where MC=MR Total revenue is P*Q = 1000Q- 0.5Q^2. MR is the first derivative of TR. So, MR=1000 - Q MC is the first derivative of TC. So, MC=100 + 5Q MC=MR is 100+5Q = 1000-Q. solve for Q. then plug the optimized Q into TC and TR to derive the ...

*November 24, 2009*

**Statistics**

you could randomly divide people into two groups, one gets BW and the other gets Color. The BW group is the control group. Or, as I gather, you want to give each student two list. Then, the control group would get BW and BW, while the test group gets BW then Color.

*November 23, 2009*

**Economics-HELP!**

As I see it, the total benefit per person function is (1-.01Q)*Q = Q-.01Q^2. So, the national total benefit function TB is 100Q-Q^2. The marginal benefit schedule is the first derivative of the TB function. So, MB=100-2Q MC of a test is given as 10. Set MC=MB and solve for Q. ...

*November 23, 2009*

**Managerial Economics**

I think something is missing and something is odd. the supply equation doesnt have a Q in it and the demand equation has some weird character. Regardless, set supply=demand and solve.

*November 23, 2009*

**managerial economics**

First, the parameter estimates are for a and b. a is the intercept, b is the coefficient on N. (n and N appear to be used interchangeably). I would argue the equation does a poor job of predicting total earnings E. The R-Squared is well below a number I would like to see. The ...

*November 23, 2009*

**managerial economics**

see my post to Cheri above.

*November 23, 2009*

**managerial economics**

Set MC = MR and solve for P. That is 40P = 1000-10P

*November 23, 2009*

**managerial economics**

Do you have a question?

*November 23, 2009*

**econ**

Its kinda hard to tell, but something in your answer looks odd. There is nothing in your profit equation that would produce the term "-2bQ"

*November 23, 2009*

**ECON**

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

*November 22, 2009*

**stats**

Ok, you have 5 cards showing, meaning 47 remain. You have 4 hearts showing, meaning 9 remain. There are 47-choose-2 ways of picking the next two cards. = 47!/2!(47-2)! =1081 possible ways. This will be the denominator. Now then, the number of ways of picking a heart and ...

*November 21, 2009*

**Microeconomics**

Both production runs of 300 and 400 produce the same profit and the maximized profit. Take it from here.

*November 21, 2009*

**Probability**

I believe I answered this in an earlier post. There are 9 possible values for the first digit and 9 for the second, and so on. So, there are 9^8 possible serial numbers, where no digits is a zero. Similarly, there are 8^8 possible values where no digit is a zero or a seven. So...

*November 21, 2009*

**Economics**

Do a little research, then take a shot, what do you think?

*November 20, 2009*

**Economics**

Do a little research, then take a shot, what do you think? Hint: Lots of firms today have a 10+ percent market share and a regulator knowing a firm's MC is quite a tall order. So there are two you can eliminate.

*November 20, 2009*

**micro economics**

Take a shot, what do you think? Hint: think about economies of scale (if any) and how that affects a supply curve.

*November 20, 2009*

**managerial economics**

Always Always Always. Set MC=MR. MC is the first derivitive of the TC function. So, MC=4+4Q. Solve for Q.

*November 19, 2009*

**Probability**

With a fair coin the probability of a given 7-flip series is equal to ANY 7-flip series. That is, P(HHHHTTT) = P(TTTHHHH) = P(THTHTHT).... There are 2^7 = 128 possible 7-filp series. This is the denominator. There are 4-choose-7 ways to have a 4 heads in 7 filps. 4-choose-7 is...

*November 19, 2009*