From Tweets to Polls: Linking Text Sentiment to Public Opinion Time Series. Brendan O’Connor http://brenocon.com Machine Learning Department Carnegie Mellon University Presentation at AAPOR, May 2012. Joint work with: Ramnath Balasubramanyan, Bryan R. Routledge, Noah A. Smith; CMUBy wind
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Aggregate. Collection of individuals present at same time and place but don’t form a unit or have similarity. Group. Number of persons regarded as forming a unit on any kind of mutual or common relation or classified together on account of a common degree of similarity. A Small Group.
Aggregate Supply – Aggregate Demand. GDP 2007 to 2010. What is Aggregate Demand?. A schedule or curve showing amounts of real output that buyers collectively desire to purchase at each possible price level. Think: Why does AD slope downward?. Think: Why does AD slope downward?.
20. Aggregate Demand and Aggregate Supply. Short-Run Economic Fluctuations. Economic activity fluctuates from year to year. In most years production of goods and services rises. On average over the past 50 years, production in the U.S. economy has grown by about 3 percent per year.
11. CHAPTER. Aggregate Supply and Aggregate Demand. After studying this chapter you will be able to. Distinguish between the macroeconomic long run and short run Explain what determines aggregate supply Explain what determines aggregate demand
AGGREGATE DEMAND AND AGGREGATE SUPPLY. Production and Prices. Applied questions. Why economies experience economic fluctuations? How do policy actions by the government and the Federal Reserve affect output and prices?
P R E P A R E D B Y. Aggregate Demand and Aggregate Supply. As we explained in previous chapters, recessions occur when output fails to grow and unemployment rises. Economics: Principles, Applications, and Tools O’Sullivan, Sheffrin, Perez 6/e.
20. Aggregate Demand and Aggregate Supply. The Aggregate Supply Curve. Why the aggregate-supply (AS) curve slopes upward in the short-run Basic Microeconomic Theory Increase in overall level of prices in economy Tends to raise the quantity of goods and services supplied
20. Aggregate Demand and Aggregate Supply. Aggregate Demand & Aggregate Supply. Economic activity Fluctuates from year to year Economic fluctuation Business cycle Recession Economic contraction Period of declining real incomes and rising unemployment Depression Severe recession.
Aggregate Demand and Aggregate Supply. Chapter 29. Aggregate Demand. Aggregate Demand is the relationship between the price level and the real GDP When the price level goes up, the demand for real GDP goes down. PL. AD. RGDP. Aggregate Demand. Why is the curve downward sloping?
E S S E N T I A L S O F. F O U R T H E D I T I O N. Aggregate Demand and Aggregate Supply. 23. In this chapter, look for the answers to these questions:. What are economic fluctuations? What are their characteristics?