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Question: please answer b and c only...

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Please answer b and c only
CHAPTER 5 Demand Estimation 215 Qr = 12 1.86-95OPr + 004Y-221 Pz Year 1986 1987 1988 1989 1990 ら(S) 14 Year 1991 1992 1993 1994 199 P, (S) 18 Year 1996 1997 1998 1999 2000 (-5.12) (2.18) (-0.68) F-167.33 15 15 18 21 24 16 17 R2 = 0.9633 D-w = 2.38 20 (a) Explain why you think we have chosen to include the price of commodity Z in the above regression. (b) Evaluate the above regression results. (c) What type of commodity is Z? Can you be sure? 17 ($) 20 Year 2001 2002 2003 2004 2005 P, (S) 23 19 21
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