Econ Notesheet Midterm 1.docx

Econ Notesheet Midterm 1.docx - 2 In Problem 15-5 the...

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Unformatted text preview: 2- In Problem 15-5. the demand function for (bangles is given by DUI) = 02+ 1)’2- If the price 4. in the some football conference as the university in Problem 15.9 is another univemity where oidmngles is so, then the price elasticity ni‘demand is the demand for football tickets at each game is 180,000 — 12.00011. If the capacity of the a D p .3 P stadium at that university is 80,000 seats, what is the revenuemiiximizing price for this uni- o.) 77.20. E: .37).... : v2(P+l . -— _2 versitytochargeper ticket? [W W P- l? JUN; (b) —3.60. D (lo-H) TR 5 p. F: POEM,” - my“ ,0 z i l ‘ +0 ~5Al]. (c) p T :2’19‘ .. im— _ wing (at) $1.50 ol‘l’K _, 0' .. 2%!th : 0 M”)! FHA: ‘ (d) 0.90. Vii ._ + - $353 :17,- _ i509.” _i.so. ‘l i (c) 515 P“ WM” 7 5, Sell 3’1”” flake-[y {5 (d) 33.75 ’ W _ i a” 1M0 {3mm — PM”)? e 80de I .ipblem.,iisl niifdlhEb' b 1'- m . 07. =— r .. 8 pi. .‘i’ .qun‘f‘ofisimei’. 3.33033? 3035. visit s“..§°.fii';.s'éys§§i sittt'éfe’s'gt'ifis (9) $22.50 g. HM“ l'z‘.W ( i l ‘ X100 _ lzP 22::iiinri;.ii.:i:.“;:h.‘i"gzrimitt:“i“mm1- MW“ so .. A. sum semis em Wk F ii {0 W‘ > ' u (i M‘ 4. In Problem 5.3, Ambrose's utility is ”(21.22) = 42:” + 11. If the price of nuts (good 1) is (a) 320. l ‘E ' 1 P1 $1, the price of berries (good 2) is $3, and his inwme is 60, how marry units of NUTS will a» 2m. (owl) 32in): (“X3247 m) ”New“: BIA/M J ,{h m. — -— @ Li (g-a : 9(57'4’.) (s) s ~—+” : Fax-«J fl 1%”: __ “Z (d) 30.22. 4% 0'“ 0% - M _. _——_. (8) $4.40. 200 : lfo —5‘ r“, @ 3‘ Z i if}, 5r : 5—0 (c) 72 Sipp< y—C Lida/‘76; in” IKS :11 “i ' (d) as F : ,3, main (9)18:}_*—l:> mw ‘ 5. in Problem 15.9, the demand for tickets is given by D01) = 200.000 710.000,», where p is the 07,),l _ 3 i Q, = 3K price of tickets. If the price of tickets is $17. then the price elasticity of demand for tlchets is 5. Ambmm-8 “may mm”, is 445;!“ + a. If the price of nuts (good 1) is $1. the price of berries (good 2) is $3, and his income is 051. how many units of BERRlES will Ambrose choose? —1l.33. l? m m.“ r _ i” a 3 13 s strum]. Fro P W’i’m/ 44-3; : M I (a) 31 ‘ (b) 45.50. at? 0 301”“ @D s But/99} E? wimp, fi/k. + P1 W1 : M {c’ "17‘ ~17 52; 1° "36 +31%: 1;» d —2.03. ... --—- (J - 3 (e, a 3 $1 2 l; —5.67. 4/1, : -' ._ SA 6 7 a. Amhrm’e brother Christophe- haa an income of 8265 and I utility function Mann) - _‘ l 104/144," Thepfloeofgoodl(nuts)in$5andflwpflmofgood2(hurrisa)iu91. How 2. Ma. Quasimodo in Problem 14.3 has the utility function U (1mm) = 10052 — 2"}2+m, where 1 many unis. oi'nuu will Christopher demand? -l/ is her consumption of earplugs and m is money left over to spend on other stufl. If she has 59 A”: -3 u ///b. 1%) 7”” w. ‘— ; 5_ $10,000 to spend on earplugs and other stuff and if the price of earplugs rises from $50 to :3 45 a]; = air/11»; E i ' —: W $75, then her not consumer’s surplus all“ hat/U34; “Clio-43?] ISh‘Pcr'l-‘Ei: “grgfa (c 47 Slur/r :3 Bin/54+ Lin“ : Viz-j: ___3’ inlleby937.50. “14,5 9W9", :- i {ism pm $3: ‘3’— : -5 a I (1:) tall by2,937.50. # i”) fa":"3525' “-Pd’: 'DM—kj :3. Pas: lM-fl?‘ m w 3r: 5 m. ”fi- 4"” (‘9 ‘mmm‘iB-ii- C9 41+ Rem; Miami): izw ‘ 7 = my. (a) increases by 1,875. C 5 aii- 3:3 751.: (29(3) : '3 iZJ’ a 3.. Nut F.;.i , 1 .12 ~q'__ 4C3- i250‘3i2fszq'37if ”BIA/4:}. w-(ig‘ifiv j—ji KL" I’sl‘ "M q I = 0’47. -'l— ~24 4m=24 1. In P113an 5.], Charlie has a utility function Memes) = 241-3, the price of apples is $1, and 3 “/3354- l You -u-c work HARDER! 07». V— 2 the price of bananas is $2. If Charlie’s income were $320, how many units of bananas would W = 6 he consume if he chase the bundle that maximized his utility subject to his budget constraint? 4/: = 35 1.. Ambrose‘s brother Anselm has In innorne of $159 and 3 utility I'm-lotion (“ch”) = 48::"+n. The price of nut: (in) is 84 end the price of berries (:1) in ll. Haw many unit: of hurries will , .J = I I .80 ErFlVieVi'l' K e‘ M Q’A’fib Ammdm?fi¢.+rz%1m l _ 15 (b) so Jim: 04% 2) ifggyjziéy: Am ‘DflgJ/éfl (5?“ $3541.41. m (c) 100 (c) a“ $2 = ‘5’ ”L m _ F J. ’5 8. In Problem 16.6, the demand function for Schreckliche is 200— AR; —2PL and the demand func- (d) 16 i ‘H '- 5 Q8 :9 2 [325!) :' {gt} 3; 2 , (4L; :) éi/ ,_. J: 331 tion for LaMerdes is zoo—sprig. where P5 and P1, are respectively the price of Schrecklichs (e) 240 {3 3 ' 2 and LaMerdes. If the world supply of Schrocklicha is 100 and the world supply of Lumen-lea is 140, than the equilibrium price of Schreckliohs is 2. Charlie’s utility function is momma) = “my. If Charlie’s income were $40, the price of $18. loo c200.— qu -2FL C) Li P3 +1.?! :- ’00 apples wane 4, and the price of bananas were $6, how many apples would there be in the best bundle that Charlie could afiord? , I (b) 325 [km _ :2 1 :5 f’ i7 L] (60-3? ) +2f£ : [00 Eirrnessi Eur/e Li: ”A ”if (a) $32. ’- 5 2 L d (a) 10 I |( Li“ “it; P : so 3 aiO-IZP +2? 2” (b) 12 “am; 04:71 =33 40:20: 45;, =7474— q 25’ (d) m S " f: L z. (c) 8 Hr J- 2” 4' 1 P hi 312 3115:)t1b336.m n. h d t f bndl ‘Lw : [08- . n m m . it’s mo 'me e e I' r II 6 (d) 9 [I] M -: P543 2 2. [$15) 32/ : 5 $13 1‘5) 6/3 J‘ 2" -: 3 from herefovurile lfucndle fir Taming! by the sum 1‘: enigma Valfizs :fethe Billie-sneer. Her tavufite bundle for ’lbmmy is (2,1), ills: is, 2 cookies and 7 glass: of milk. Tommy‘s i ‘1 : P @ 5 mother’s indifference curve that passes through the point (a, m) = (d. 5) also passes through L (a) thewint(5,3). (4,5) iiAS 2 ”My" P :- éo“ 3 (“-1) eoins.,,.and,. . a. In Problem-1.5.2,. Clara’s utility function is irony) = (x +2)(Y+ 1). If Clara’s marginal rate Q film: (:21?) (a 7) ‘4 9) m l<. «5 CM ol 2 1e; 5 z 15 gifjgflzfiizgr —2 and she is consuming 11 units of good X. how many units of good Y is 3'; 3w p°i:l;(4'::‘v:2'5)'m (2,9). 3 [“965 I _p Pu I ”C ‘i—A a H 8 one 0 l e a . (J 2 MES: .42: ~MX— Hit-ill. —-(‘{9Li) 5 WC Mr5.TWi‘i’ prefers 8. ~— : . (b) 26 aid/oi ll (Xi—2) 13 um nimble 0!.IJHMM; [5 l2 [ 4. {-Zf ; q Mr; Twhi’is ”Jiffy, " (c) 13 “9 MW" (5 vhf/”J y 25 -2(i3): *(l’H) All c/mw; whfka /£-2/+ {WWI = 4/ 7 re) 5 26: ‘(Jrl 7 g a \r 1. In Problem 14.1. Sir Plus has a demand function for mead that is given by the equation “u n d h. D(p) = 100 — 12. If the price of mead is $95, how much is Sir Plus’s net consumer‘s surplus? W 12.50 C5 : -£_ Jugs,» heififh'i' , (b) 5 -_. .L 5‘ a; (a a) .. J m Foils ‘ (d) 5.25 = i2.r Perfect Suhntinued; Utahzl) = an + .322 With perfect lubeiitutee, there ale three pnesibllitla: The onneunia will spam. her entire income on :1. the consumer will spend her entire income on :1, or the camumei will he mdllheient between any point on hu- huiiget line. Sinee an] pimiden the same level of utility ad 5124122 WE will spend her eniiie tom on 2. it up. < i924. Mathematically, the additional phase at information for this one u 22 = 0. Beginning with the budget equation. pm +Piln = m nuhetltute the additional Information that 11 : El. and. rearrange to Iolve for 2‘. F111 +P22i 5 m Pm +1120?) = "I 2i : mini oedemmmnmmeambempmdmemeammm m ET] 0171 < fim :liPhFivm) = u 5 2] g 2 up, = 5P2 in 0 am > in Demand for 2. ie determined ia the me way. in 7 > 3 P2 C'11! PI zfllpliplvm): ugzlgfl apl=fipi P1 '1 am < in»: Quasiilnenr: Uilivla) = 1(2)) + z: Hem, the quantity at In ehneen is determined by the tangency oi the indih'emme curve a: the budget line. Win!” w 9:3 I Il‘CflVM’ is (25)(1)i~(20)(3) : 255'. In Problem 4.2, Anibmee nae the utility luneilmi ”[21,53] = 42?} :3. u Ambrose we initially consuming 25 units of nuta (mod I) and 21 unite of herriw {good 2). then what. in the largest nun-her of berries that he would he willing to give up in retren- for an additional 11 uri ftlu '2‘ m w (2520 We (36/ 31) @532:‘[ [‘I‘i’Jii‘y lfV‘vl Mu$+ 1" 55”” 4} f; :, WWI). Lure—rm : “-ll @4 ”[3‘sz):qm+/lpl ci‘lt/Z‘L ('3 2 437’: l7 (I) Awhrfit Weill le‘C Mr 11“l7=Ll tumult; If Heroine (whose utility function is min{z,y], where it is her consumption of earrings and u is money left for other atoll) had an income of $24 and was paying a price of $5 for earring A partieuiaily Itraightlonvlrd example ll when flay] - 1n(r.). 4- am.) = i_. 021 Pi was 1 _ Fr :7... lilpiipiiml=fi (b) C Substituting this into the hiniget equation and rearranging in naive int iii, 5d: P121 Wm ="I (e) nun/n) Hm = m m: = "I —m ”L 5 . . = — u 1 - with P: V“) m when the price of earring went up to $8, then the equivalent variation of the price change (05'; MC ‘(lVl-(I Olin/Q; 47L Fihfll amt: ”and [1.4, 58' 3'24: 343+?) angina! Jana-P: $12. = $24, :g:+¢ §%l+E;—:ié $4. _ zl| “a m.¢-i,ov% EU: 2i~t=$ In Problem 14.7, Lolita’s utility function is (may) = n — 29/2 + y where in is her consump- tion of cow feed and y is her consumption of hay. If the price of now feed is $0.20, the price of hay is $1, and her income is $2 and if Lolita chooses the combination of hay and Cnhh-Dmiglu: “21.12) = :fzg We derived the emaaem rule by maximizing utility subject m the budget maeimim. Demand hmctinns m be derived by simple maximum. .i the men mie. n (b) mm=l71=l (C) needing: (d) WWW“ (e) lzlfiiimvml: $5 Perfect [in'mpllsn-le: No.12): mln{flzi.fll'2l molwo good we. Foranuiiieu'nal example, findthe utility Inuiniizingchnicewliere U(x,zz)-x:”rf”, 121-3, pz -2,and iii-3i]. It‘ll? ofresourcesaiea'pemon x] ammofreemucamapenton x=,$lflwillbespeiitnngnnfl lanflSZUwillheapent manual x‘-]D.i3 x, -3.33 ii1 -2012 1:1 -10 Linear use; nun.) - m, 1- fix: Inthiicaiie, ml isaperfmrubacimnefor myanilthereisoompleieileedonim whalinitelietwaenflielwo. Hencetheimiieiaiiamntive, ml or Ifizz,willhechosen. Consideranunierica] examplewherefihirleymwammconmewmmf beer. Hung-167i, +3.32. LeI {ll-3,192 -2,aui1 iii -15. lfSliii-ley apenilalier miirebudgeionlfimcamshecanafinfllnanl. Alternaiivelyfiliccanafi'crdlifi, manna. Since 5 Means inieraaci a higher indifference median 7.5 3 ounce mashechocaenheSlnouncecana Thiaiipictuiedbelow: cow feed that she likes best from among those combinations she can afl'oid, her utility will be 2.32. aw: :% e. ~ 0-63] K “Pd, _. “£13 __ ~,2 1.80. "Elk 3” 45/5 ‘ J _ fly ‘ l . . — z __ M , '2 fl ¢‘ '2‘”%”” uzaiifliihfl 132: 3: h'l— @2449 :Z'<0.Z)(fli5) 2 : "ng 1‘ 2‘32 In Problem 4.l, Charlie’s utility function is MAB) = AB where A and B are the numbered apples and bananas. respectively, that he moi-nee If Charlie is consuming IO apples and '3",le : i . . . . . 3U banana, than if we put apples on the howinontll axis and henna» an the vertical axis, ELI/9:, p; The the demand fnncimn can he solved hy locating the inn]: Eroni the miiiiferenue curve on the budget the 3101,, of hi! indifieflm curve at his curiunt oomption is ififlzlflflzl = 1 equation. The kink is described by on; : fin. 1 p1 Pili+Pizr:m (a) '11' 35 d 6 _. —3u/nift haAE/JA- Renaming and simplifying. : (fl 4. El - “E— 2: no.) 7 fl ""+”1‘°/fl"‘ '” A a u 0 [g afiB/J B 311 7 P2 hIi + min/fillzi = m (c) in. The axaet form ante demand function depend. upon {(21). z.(p.,p.,m) = L (d) fill _ 3 Pl fine/fl) (9) —1,'n : _...’-'— As an alternative. consider setting the slope of the indiiierauce curve equal to the alope of the budget 1 pm H1212 = in ID A f A Manipulate the budget equation to solve for the slope of the budget line drawn with $1 on the hon'zo PAW/Cl)“ + p112 : m 5 if? is 2%! _ .3 . . . l - axis and $2 on the vertical axis. MW“) Hell: = "1 P1111 +P2$2 :7" = L I 71" _ 1 Zilpimii'nl MW“) fl)! [’2 2- 111 1 Consider maximizing n Cobb-Douglas utility function in 1 . . . . . $2 =E * fTEi um E2) = fr” 3. Bernice in Problem 14.5 has the utility function 110:, y) = min{:i:,y}, whens e is the number of 2 ' ‘ 2 pairs of earrings she buys per week and y is the number of dollars per week she has left to The slope of the indjflernice curve is subject in 5 budget wmumnt spend on other things. (We allow the possibility that she buys fractional numbers of pairs of ilfl :—BU/B$1 m = p111 +1;an gaining; liar vfieek) If all; origimlly had 8%“ income of $6 pesgw'efik and was paying option 3; it all a“ , . . per pair 0 earnngs, t an I 9. price 0 earrings rose to . e compensating variation 1 / U’mg the Lagrangian mwmd' ,, 5 that price chang (measured in dollars per week) would be closest to .l kink fixing/311 t. = 1-le 7 Mm ’Flml 711222) $3 it“ :3 =— o . _. afilg/awg 37: = Hafiz: 7 Apr () g/E ’3 w éb ilfi +l' ’5 , new: i when... m u G = M WWI n ” MM“ keTE 71 i=m7p$ 7mm if $12 =_fl BA 1 J ’ U [4-i- new one; .4 £454; in." Solving for A. (e) $11. Q At > ll . _ e, we: =. nd (3 GM? = 17. +4 lady ‘ ‘ — in ~ fim‘ neiz‘“ A View a H C MI (42 Settin thetwoaln a uni —“= I"M g P on on; p, I” CU: l2~62£ —fi—$l = _ 11—2 Eliminating A, 6 I5 51137112 _ BI)" 271 5M" 0" d4? Airgun n.1uio w: =fipiwi p1 — p2 3mm...” 4 n9 u/Myfl _ Ll w 3% _ .1 w Meal: anxgri Cur-V0 My}; —‘ W : /’r 5 _ 3 P212 :Eplml p Lalo = ”Lewis B ¢Aq ¢fi 1 I 2 1 2 . . , . . . . The final steps m substituting this imam Domitian in“) the budget em“ a _ .5 " 1.233.121“.3727;:$313ii-i‘i'iftt’imaliiififizii‘. Em“; ii”t3‘.’t§iil‘.‘.i§f.‘i.t§ _ M _ m =;Ur-1=i +1122? p.21 132.111 w never Slip; ,J; 614/701 LIVle : “PA I 3 _ ‘3 one = 5pm (D Me = axe. "l/k T}? W ‘ = 15”" + EP‘E‘ iting into the budget eminent, in) X5 = xi. —3 < J m 7 a + 3p 1 (c) XA =4th 4734 — 1 1 mzpixi-l-pzzi (d) X =4X 0: 5 an; nix =M 3 WA: LiA’q; n+3?” =P1Ei :pimi+;piZi (9) I” E - gunman: mafiufilxz} -g(x,)+xl And by substitution, in = —p 111 3 m7 1 Lump,“ Inmisiasauiiliryielimarmx: butnonliiieariiix]. w‘hileitispnssiiilefolaonmnnier (2+1? —pz 2 ”WE ionhooneahuni‘llecnnmiuingallxlnndno 1:,folcertainfiinclinnnlfnrmaofg(‘)such And l’l’ substitution m the natural log below, it may lie Masai-y in consume at last me x] at any amt. ii. In Problem 5.6, Elmer’s utility function is U(ai,y) f min(z,y"}, If the price of e is $25, the I _ Therefore a consumer duel not have complete fieaimn to sum m“ x] and :r. . prion ofy is 20, and Elmer dwoses to noneume 3 units at Y, what must Elmer r income he? “+57" 4‘21? In the '5 w: have m ihus far in A _ 80 be: m _ a m or a (a) 570 a The final two equations are known as the mic/neat, or budget share rule. For Gobi-Dough! preferences, Millil lognnilinL For m ofllime was, the marginal mntrihuijon of x] exceeds that (b) 135 Elie urgeniuu ofwtal income spent on z, is u/(u+fi). The proportion uftutal income sp-t an m, is «x: forum fimfewdnllara 5mm Alan Mlple, con-filer “(Xile‘MT-i)‘li (a 385 3 /(o )iijohbnnuglan use: u(xx,)-x'x’ Whfle p] -3. p1 -2,anil ill-24. Toaolvemathenintimilyfienheslapeoflhe (a, 7‘. “‘ " ’ I inflifielencemequaltotheslopeoffliehudgetline. "5 . . ' Futhchbh-Duuglaauaamthereisfieedommmnmx]flirx1,bu1inamolnlimilod -I3Ihl3x,-—_p| (e) The” " “M "“5“ ”mum" “’ “I" W 55153 llian nie previnus example. NINE that uniiry Will be zero iteiiiier x] or x1 is equal But-312 Pa El 1153 ioziero. mesolvmgihispmhleminonmpletegeneraljwusingnmmutual -1i"x‘_-_3 may (OTISLUVI-(S fl‘j' Kink ‘4: meconsunierspenm a %Dflmflmefllfx]anfl '8 %forxi.11ii's,m ] 2 F" V' a e ,s a e ,3 ‘ 2 ' mnjunoiionwitiiiliemilityfiinclimi: enough informiionto Inlve mathematicallyior ‘1'} Ifsag-zisspenion r..ilieremaininghudget,524—2-22,:anliespemon r}. e-nm Xz-ll Klemflfleeuirixal-nfinlmflr.) Fumehnkodmmfimmmiheteiamfioedmiorubammbmnme oomiiiipiinngnodi. Efficient consumption munmuanlie lciiik. 'l'heloinllii described malhemaiiccllyby the condition axl - fi‘i- This inforlliiniiin1 plusihe equation oiihe budget line, is ruineem iofinil ineihemiiiaii Inhlnoii. Suppose “(mil-milling). 1:21 -3. p1 -2,anrl in -35. 211-11. smmg lliis into 1112 budget emotion gives 3):. +731 - 35 3x. 1- Kb.) - 33 7x. - 35 Jr. - 5 xi - 2(5) x1 -10 ...
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