UCSD ECON120C Midterm II Summer '08 - Key

UCSD ECON120C Midterm II Summer '08 - Key - STUDENT CONSENT...

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STUDENT CONSENT FOR RELEASE OF STUDENT INFORMATION (Buckley Waiver) I hereby authorize the UCSD Economics Department to return my graded final examination/research paper by placing it in a location accessible to all students in the course. I understand that the return of my examination/research paper as described above may result in disclosure of personally identifiable information, that is not public information as defined in UCSD PPM 160-2, and I hereby consent to the disclosure of such information. Quarter Summer 2008-S1 Course Econ 120C Date August 2, 2008 Instructor Professor Yongil Jeon S t u d e n t I D # P r i n t N a m e S i g n a t u r e
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2 Answer to HW#2, ECO 120C, Summer 2008 – S2 Economics 120C Name: _________________________ Professor Yongil Jeon Summer 2008-2 Student ID#: _________________________ Answer to Homework #2 – Summer 2008-Session 2, Econ 120C (Final Exam, Summer 2008-Session 1, Econ 120C) Answer all questions on separate paper. This problem set should be handed in to your TA at the beginning of your review session on Wednesday, September 3rd, 2008. Problem sets may not be handed in once solutions have been distributed. Please write down your name and PID clearly. Good luck! Multiple Choices 1. (3 points) Panel data is also called a. longitudinal data. b. cross-sectional data. c. time series data. d. experimental data. Answer : a 2. (3 points) The difference between an unbalanced and a balanced panel is that a. you cannot have both fixed time effects and fixed entity effects regressions. b. an unbalanced panel contains missing observations for at least one time period or one entity. c. the impact of different regressors are roughly the same for balanced but not for unbalanced panels. d. in the former you may not include drivers who have been drinking in the fatality rate/beer tax study. Answer : b 3. (3 points) Time Fixed Effects regression are useful in dealing with omitted variables a. even if you only have a cross-section of data available. b. if these omitted variables are constant across entities but vary over time. c. when there are more than 100 observations. d. if these omitted variables are constant across time but not over entities. Answer : b 4. (3 points) A repeated cross-sectional data set a. is also referred to as panel data. b. is a collection of cross-sectional data sets, where each cross-sectional data
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3 Answer to HW#2, ECO 120C, Summer 2008 – S2 set corresponds to a different time period. c. samples identical entities at least twice. d. is typically used for estimating the following regression model 01 2 1 , 1, ... it it it r r it it YX W W u β ββ + =+ + + + + Answer : b 5. (3 points). The time interval between observations can be all of the following with the exception of data collected a. daily. b. by decade. c. bi-weekly.
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This note was uploaded on 02/18/2009 for the course ECON ECON 120C taught by Professor Jeon,youngil during the Winter '09 term at UCSD.

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UCSD ECON120C Midterm II Summer '08 - Key - STUDENT CONSENT...

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