New User Special Price Expires in

Let's log you in.

Sign in with Facebook


Don't have a StudySoup account? Create one here!


Create a StudySoup account

Be part of our community, it's free to join!

Sign up with Facebook


Create your account
By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here

Week 4

by: Eunice

Week 4 PAM 2000


Preview These Notes for FREE

Get a free preview of these Notes, just enter your email below.

Unlock Preview
Unlock Preview

Preview these materials now for free

Why put in your email? Get access to more of this material and other relevant free materials for your school

View Preview

About this Document

Cobb-Douglas Extreme Preferences Corner vs. Interior Solutions Tangency
Intermediate Microeconomics
McDermott, E
Class Notes
Economics, PAM
25 ?




Popular in Intermediate Microeconomics

Popular in Political Science

This 3 page Class Notes was uploaded by Eunice on Saturday February 20, 2016. The Class Notes belongs to PAM 2000 at Cornell University taught by McDermott, E in Fall 2015. Since its upload, it has received 32 views. For similar materials see Intermediate Microeconomics in Political Science at Cornell University.

Similar to PAM 2000 at Cornell

Popular in Political Science


Reviews for Week 4


Report this Material


What is Karma?


Karma is the currency of StudySoup.

You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 02/20/16
PAM 2000 McDermott Spring 2016 February 18, 2016  tangency o consumers will maximize utility = choose a bundle om the “highest” indifference curve possible o the optimal curve will be where the IC and BC are tangent  where the slope of the BC (-p /p x =yslope of the IC (MRS = -MU xMU ) y  MRS is calculated by taking the partial derivative of the utility function in respect to x and then y (professor will give us the MU values)  the ratio of marginal benefits is equal to the ratio of marginal costs at the optimal bundle o NOTE: just having the same slope does not mean that that the BC and IC are tangent. the point at which the slopes are the same must also be a point that satisfies the function of the BC.** o the algebra  cobb-douglas utility function a 1-a  u(x,y) = x y  ensures that fractions of earnings go to each good, regardless of income/prices  a + (1-a) = 1 (usually the case)  typically 2/3 goes to capital and 1/3 goes to labor in the case that the cobb-douglas function is applied as a production function  example  given values M = 64, p = 2, p = 8, and u(x,y) = x y .25.75 x y  then, given the marginal utilities,: o MU x .25x -.7y.75 .25 -.25 o MU y .75x y o -px/py= -MU /xU y o simplify and get an expression: p /p x (y/3x)  y = 3xp /x y  **this is the function of all points where the IC and BC have the same slope  solve for x or y and plug it into the BC function to discover the actual point of tangency  M = p xx+p (3yp /p x y  = 4xp x  x = M/4p x o NOTE: the constant is ¼, the value of a in the utility function o this means that the fractions in the exponent are the fractions of the income spent on each good (when the fractions sum to 1)  x = 8  using x, solve for y (which = 6)  so the point of tangency is (8, 6)  cobb-douglas IC  always smooth and will never touch the axes o u(x,y) = x y1-a o is x or y is zero then u = 0 o this assumes that the consumer will always want some of both o interior solution  the optimal bundle lies in the interior of the first quadrant  (often at the point of tangency between BC and IC) o exceptions being: Leontief and kinked BCs o Corner Solution (complement of Interior Solution)  consumer is constrained from having a negative quantity of x or y***  the optimal bundle is on one of the axes (the IC touches the BC at the corner of the BC)  it’s possible to have the IC tangent at the axes which is rare and would make it an interior solution  mathematically, the consumer would want to purchase a negative units of a good (which is impossible so the solution is limited to the corner of the BC)  ***consumer wants to be on the outside of the quadrant  in order to calculate, plug in x=M/p xnd y=0, y=M/p and y=0 to find the optimal bundle o extreme preferences  usually: people want a mix of both goods but ratio will change depending on prices  Leontief: people will always want a specific ratio regardless of price  linear preferences:  goods are perfect substitutes  u(x,y) = Ax + By o MU x A o MU y B  ie, coke and pepsi even if coke is liked precisely twice as much as pepsi o u(c,p) = 2c + p o MU: easy to calculate in this form (not cobb- douglas); coke MU is 2 and pepsi MU is 1  MU are always constant and thus the MRS is always constant  thus the slope of the IC is the negative of MRS  so the IC is a straight line  often the solution is a corner solution o given p /p and MU /MU x y x y  if the two are not equal (one is greater than the other) then the solution is a corner one  if BC’s slope is greater, then the consumer will purchase only good y  if IC’s slope is greater, then the consumer will purchase only good x o an interior solution with linear preferences would mean that the BC has the same function as the IC in which case, any bundle on the BC would satisfy the consumer  kinked BC:  solution could be interior but not necessarily tangent (could be at the bend)


Buy Material

Are you sure you want to buy this material for

25 Karma

Buy Material

BOOM! Enjoy Your Free Notes!

We've added these Notes to your profile, click here to view them now.


You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

Why people love StudySoup

Steve Martinelli UC Los Angeles

"There's no way I would have passed my Organic Chemistry class this semester without the notes and study guides I got from StudySoup."

Janice Dongeun University of Washington

"I used the money I made selling my notes & study guides to pay for spring break in Olympia, Washington...which was Sweet!"

Jim McGreen Ohio University

"Knowing I can count on the Elite Notetaker in my class allows me to focus on what the professor is saying instead of just scribbling notes the whole time and falling behind."

Parker Thompson 500 Startups

"It's a great way for students to improve their educational experience and it seemed like a product that everybody wants, so all the people participating are winning."

Become an Elite Notetaker and start selling your notes online!

Refund Policy


All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email


StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here:

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.