” 辅导EC220程序设计、 写作JavaSummer 2021 ExamEC220Introduction to EconometricsSuitable for all candidatesInstructions to candidatesThis paper contains FOUR questions, divided into two sections. Section A contains ONE questionrelated to Michaelmas Term and Section B contains THREE questions related to Lent Term. Youshould answer ALL questions from Section A and ALL questions from Section B.If at any point in this exam you feel that Anything is unclear, please make additional assumptions thatyou feel are necessary and state them clearly.For Section A: Please type your answer in a Word-processing software on a computer (e.g. Word).You could combine the typed document with scanned or photographed hand-drawn diagrams andcomputations. The maximumword count is 1500 words, beyond which nothing will be marked. Thereis no minimum word count and concise answers will be rewarded.For Section B: Please use pen and paper and scan (or photograph) your answers. You could also usean iPad or a tablet. There is no maximum word count for Section B. Please annotate your answersclearly.The answers must then be converted to pdf and uploaded to Moodle as ONE individual file togetherwith the Coversheet. Please make sure every single scanned page is legible and properly ordered.The file will be run through Turnitin to ensure academic integrity.Time Allowed Submit PDF with answers within 24 hours after official start of the examExpected effort Reading Time: 15 minutesAnswering Time: 3 hoursYou are supplied with: Lindley Scott Cambridge Statistical TablesTable A5 Durbin-Watson d-statisticYou may also use: Open book ExaminationCalculators: Calculators are allowed in this examLSE ST 2021/EC220 Page 1 of 7Section A(Answer all questions.)Question 1[33.34 marks]A blowout of the BPDeepwater Horizon oil-well in April 2010 led to the largestmarine oil spill in history,lasting until July of that year. Researchers would like to analyse whether consumers reacted to thedisaster by reducing their Consumption of BP branded petrol during the oil spill. They collected dataon the prices and quantities sold at BP-branded and non-BP petrol stations across zip codes (postalcodes; small local areas) in the US. Either a zip code contains BP stations, in which case the averageprice and average number of gallons sold for each of these BP stations is recorded (and the indicatorvariableBP = 1), or a zip code contains no BP station, in which case the price and quantity at thesenon-BP stations is recorded (and BP = 0). An observation is a particular petrol station. Non-BPstations in BP zip codes are not used in the sample.Prices and quantities are the averages either for the period January 2009 to March 2010 (before theoil spill) in columns (1) and (2) or for April 2010 to July 2010 (during the oil spill) in columns (3) to (6)of the table below. Prices are in US Dollars per gallon and coded as Price. Quantities are in logarithmand coded as ln(sales). The researchers also constructed a variable called Green Index, which issupposed to measure the environmental orientation of consumers in the zip code. TheGreen Indexis constructed by combining the share of hybrid vehicle registrations, per capita membership in theSierra Club, an environmental Organisation, and per capita contributions to Green Party election fundsin the zip code, all measured prior to 2010. The Green index is then standardised to have mean 0and standard deviation 1. Using either Price or ln(sales) as the dependent variable, the researchersobtain the following results.请加QQ：99515681 或邮箱：99515681@qq.com WX：codehelp
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