1 / 64

Ethics/Tastes

Ethics/Tastes. Handbook Ch 19. Public Goods. Public Goods are defined by two characteristics Non-excludability : once the goods are produced, there is no way to exclude anybody from consuming them. Non- subtractability (non-rival): once the good is provided it is not depletable .

dung
Télécharger la présentation

Ethics/Tastes

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Ethics/Tastes Handbook Ch 19

  2. Public Goods • Public Goods are defined by two characteristics • Non-excludability: once the goods are produced, there is no way to exclude anybody from consuming them. • Non-subtractability(non-rival): once the good is provided it is not depletable.

  3. Examples • Lighthouses • National Defense • Radio Signals • Clean air • Street Lights • Flowers in window boxes • Examples of Public Bads • Pollution • Species Loss

  4. How is this related to Food Consumption? • If, when you purchase organic produce, there are fewer pesticide poisonings of birds etc • This generates a public good • Everyone who cares about birds benefits • The happiness you receive from the reduction in dead birds doesn’t reduce anyone else’s happiness from that same outcome

  5. Question • If • there are external benefits from your public-good provision • and you can’t capture these benefits • Will private consumers provide enough of the public good?

  6. Public Goods Experiment Note: while we will announce how much each student earns from asset B, we won’t announce Asset A investments/rewards (i.e. so your choices in this experiment are semi-confidential) • By showing up for class today you each receive 1 “point” to invest. • You will invest your 1 point across two assets. • When you “invest” your point you lose it, but you reap repayment as follows. • Asset A generates a private return only, returning to the investor exactly what she invests in it. • E.g. Suppose each student in the class invests only in Asset A. Then each student will obtain a “return” of exactly 1 point. • Asset B generates only a public return, but pays out double the investment divided by the number of students in class. • For example, if there are 40 students in class today and each invests her entire point in Asset B, then each student would receive 40x[1 x 200%]/40 = 2 “points”. • In contrast, if 39 students each invest their full point in Asset B, and one student invests her entire point in asset A, then the 39 “civic minded” students would receive 39 x [1x200%]/40 = 1.95 points and the one “self-minded” student would receive 1 + 1.95 = 2.95 points. • You may divide your point between the two assets in any way you choose. How much of your 1 point do you want to invest in: Identitier: _______________________________

  7. While we are waiting for Jenni to calculate how many participation points you each get…

  8. My speculation • Most of you will give somethingto the public good (B) • Some of you will give nothing to the public good • The average points awarded will be less than 2 points • i.e. the public good will be under-provided • Update: • Each student present in class earns XXX points from Asset B. • XXX students each allocated his/her full point to Asset B.

  9. How does society usually provide public goods? • Sometimes governments get involved • Mandate private provision • You must shovel your walk within 24 hours of a snowfall • Tax citizens and then uses revenues to pay for provision • Defense • Lighthouses • Libraries • Actually an example of a “club” good since libraries are “excludable”

  10. If policymakers cannot reach consensus regarding public provision, private provision is sometimes relied upon • Donations (as per our experiment) • Lighthouses • are classic examples of pure public goods, however throughout recent history there have been many publicly provided lighthouses • are likely to get sufficient provision even if relying on private market if satiation occurs at a finite quantity, private benefits are high and provision costs are low • Green markets • Individuals pay a price premium for “impure public goods” • These are products that bundle private and public attributes • E.g. low carbon rose • Public attribute: fewer emissions/rose • Private attribute: a pretty flower Image copied from Scientific American

  11. Green Markets • Some consumers are willing to pay a premium for goods that provide a public good • Whether a product genuinely provides a public good is unobservable • “credence” attribute

  12. Creates a role for labels confirming credence attributes • Examples of voluntary labels • Organic • Dolphin Safe Tuna • Fair-Trade

  13. What’s the value of the label? Figures 19.1 & 19.2 in Handbook

  14. $ MPCB = SB Suppose there is an old, established (and Benign) production process with marginal cost give by MPCB = d+DQ d Q

  15. Consumers $ SB • Suppose there are two types of consumers • A Type 1 individual i has individual demand MWTPi=a-bqi • From the Handbook (although you don’t need to know / understand / remember this to work with the graphs): • Let βmeasure fraction of the population that is indifferent • Convince yourself at home that if Q is the total amount consumed by the population, then the (aggregate) inverse demand from type 1s will be P1D=a-bQ/β • Draw this demand curve as D1 a d D1 Q

  16. Similarly… • A Type 2 individual j has demand MWTPj=a-rI-bqj • where • r measures disutility from “bad” product attributes • I is an indicator variable = 0 if the product is benign = 1 if the product is harmful • If the product is produced benignly, then (aggregate) inverse demand from type 2s will be P2D=a-bQ/[1-β] • Depict this with D2

  17. $ SB a d D2 D1 Q

  18. $ SB • The economy’s collective aggregate demand will be D1+D2 a D1+D2 d D2 D1 Q

  19. $ SB • Equilibrium price will be PB • Total quantity consumed will be QB a PB D1+D2 d D2 D1 Q QB

  20. $ New Process SB • Suppose a new, controversial process comes along • Associated marginal cost MPCN=c+CQ • Where c<d, C<D SN d c Q

  21. Recall there are two types of consumers • Type 1s doesn’t care how the good is produced so their inverse demand curve is unaffected MWTP1=a-bQ/β

  22. $ • Type 2s get negative utility from consuming the new technology, and so • their demand falls to MWTP2N=a-r-bQ/[1-β] SB a Note that the Aggregate Demand Curve Changes too; it’s now represented by the red line (which we’ll ignore in the graphs that follow). SN D1+D2 ~ d D2 D2 c D1 a-r D1+D2 Q

  23. Without an eco-label or third-party certification scheme, producers can’t credibly convey to consumers whether they are still using the old technology B • So all producers switch to new technology • Knowing that all producers are using the new technology, demand from type 2 consumers drops to D2

  24. $ See market price fall from PB to PN quantity consumed falls to QN SB a SN PB PN D1+D2 ~ d D2 D2 c D1 a-r QN Q QB

  25. $ SB • Type 1 (indifferent) consumers gain CS (pink) a SN PB PN D1+D2 ~ d D2 D2 c D1 a-r QN Q QB

  26. $ SB • Type 2’s effectively exit market, losing CS (yellow) a SN PB PN D1+D2 ~ d D2 D2 c D1 a-r QN Q QB

  27. $ Notice that even producers might be hurt SB • Green = PS before innovation • Blue = PS after innovation a SN PB PN D1+D2 ~ d D2 D2 c D1 a-r QN Q QB

  28. Policy Options (Handbook section 3.2) • Ban the new technology • Indifferent consumers forego their increased CS (pink area) • Concerned consumers regain their previous CS (yellow) • Should the government do it? • If a ban is the only option and yellow + green area is larger than pink + blue, then yes

  29. Alternative (Handbook section 3.4) • Government (or an independent third party) could solve the information asymmetry by certifying producers who use the benign technology.

  30. $ • Indifferent consumers can still choose to purchase goods produced with the new technology • Enjoy price PN • Concerned consumers can now purchase QR benignly produced products at price PR SB a SN PR PN D1+D2 d D2 c D1 QN Q QR

  31. $ SB a SN PR PN D1+D2 d D2 c D1 QN Q QR

  32. $ SB a SN PR PN D1+D2 d D2 c D1 QN Q QR Note for the keen: MPC of producing benign and new goods shouldn’t be treated as independent

  33. To complete the analysis… • When calculating total benefit, make sure to subtract the costs of labeling and managing the certification scheme

  34. Complications

  35. Errors • What if there are type I and type II errors in the certification process? • Type I error = false positives • Some firms that aren’t actually following organic practicies get falsely certified • Example • BC sockeye fishery has received Marine Stewardship Council’s certification as “sustainable” • http://www.theglobeandmail.com/news/british-columbia/sustainable-sockeye-eco-fraud/article1212194/ • Type II error = false negatives • A firm with a low-carbon footprint doesn’t get labeled as such because of coding error in the input-output tables

  36. Un-Certified Firms • Just like there might be some firms that are certified undeservedly… • Some firms that should qualify might eschew certification entirely • Too small • Not enough units across which to ammortize certification costs • Negative market effect • Delmas& Grant 2010 • Did hedonic analysis of 1000+ wines • Found that labeling a wine as eco-certified lowered the equilibrium price by 20% • Even when controlling for quality as measured by Wine Spectator score • Explanation: • consumers who only care about the taste of wine might infer that part of the price charged for a certified organic wine reflects additional costs of producing organically, and thus the price:taste ratio is too high

  37. Confusing Labels • When rely on third parties to certify products, may get label proliferation • Too many labels, each representing something different • Consumers get confused • Brand and label similarity • Information (over)load • Ambiguous Information • Handbook claims 200+ different eco-labels in the US alone • Some very vague • Imprecise labels • “tarnish the credibility of well-defined labels that follow diligent procedures of meaningful product and process definitions” (Handbook p.511)

  38. Let’s look more closely at a particular kind of label

  39. Fair Trade • idea: make sure that producers get a “fair” portion of retail price • common products: • “handicrafts, coffee, cocoa, sugar, tea, bananas, honey, cotton, wine, fresh fruit, chocolate, flowers, and gold.” (Wikipedia http://en.wikipedia.org/wiki/Fair_trade) • to get Fair Trade Certified, production and distribution need to be audited by third party certifiers

  40. Suppose there is no Fair Trade Label $ MPCFarmer Pw/o Dw/0 Q Qw/o

  41. Suppose a third party introduces a Fair Trade label • Labeled goods cost $x more per unit • Assume all of the premium paid goes directly to farmers • If concerned consumers fully internalize the benefit to the farmers, then their WTP rises by $x/unit as well $ MPCFarmer + x MPCFarmer $x Pw/o DFT=Dw/o + x $x Dw/0 Q Qw/o

  42. What do we see? • Consumer price rises to PFT = Pw/o + x • CS stays the same • Farmers’ Surplus rises by x*Qw/o • Win-win • (actually, win-neutral) $ MPCFarmer + x MPCFarmer $x PFT Pw/o DFT=Dw/o + x $x Dw/0 Q Qw/o

  43. In reality • Farmers typically receive far less than the premium paid • Three reports find little of the “Fair Trade” premium trickled down to producers • Valkila, Haaparanta and Niemi (2010) • “consumers in Finland paid considerably more for Fairtrade-certified coffee than for alternatives, but that only 11.5% of the extra paid went to the exporting country.” (Griffiths 2012 p.359) • Kilian, Jones, Pratt and Villalobos (2006) • “US Fairtrade coffee [gets] $5 per lb extra at retail, of which the exporting cooperative would have received 10c, or 2%” (Griffiths 2012 p.359) • Mendoza and Bastiaensen (2003) • “calculated that in the UK only 1.6 to 18% of the extra charged for Fairtrade reached the producers for one product line“(Griffiths 2012 p.359) • “Calculations from figures produced by FairtradeLabelling Organizations International (2010) • show that on average 1.53% of the retail price reaches the Third World as extra payment from Fairtrade membership” (Griffiths 2012 p.359)

  44. Are Fair Trade Products still welfare improving if there are large intermediary costs? $ • Suppose that transactions costs associated with a Fair Trade Label are $y/unit • Equilibrium price= PFT’ • Equilibrium quantity = QFT’ MPCFarmer+y+x $y MPCFarmer+x PFT’ $x MPCFarmer PFT Pw/o DFT = Dw/o+x $x Dw/0 Q Q QFT’ Qw/o

  45. Look at Farmer’s Surplus $ • Change in Farmers’ Surplus =[d+c+n]-[m+n+o] • Because the MPCfarmer+y+x curve and the MPCfarmer curve are parallel, then d+c=m • Thus change in Farmers’ Surplus is n-n-o= -o < 0 • Farmer’s are worse off • because they are selling so much less MPCFarmer+y+x a $y MPCFarmer+x b PFT’ c d e h f $x g MPCFarmer PFT k s j i r Pw/o m o n DFT = Dw/o+x $x Dw/0 Q QFT’ Qw/o

  46. Consumers? $ Change in CS =[a+b] -[b+d+f+g+i+j+r] = a -[d+f+g+i+j+r] If yellow < pink then consumer welfare falls too MPCFarmer+y+x a $y MPCFarmer+x b PFT’ c d e h f $x g MPCFarmer PFT k s j i r Pw/o m o n DFT = Dw/o+x $x Dw/0 Q Q QFT’ Qw/o

  47. Sometimes, instead of labeling products as ethical, we ban products that are offensive to some fraction of the population

  48. Foie Gras • “fat liver” (french) • duck or goose • standard method • “gavage” • force feed bird by forcing a tube down bird’s throat

  49. Foie Gras bans • Chicago (2006-2008) • California • gavage criminalized---as well as import of livers resulting from gavage---as of July 2012 • Gavage • legal in Canada • banned in Israel, Argentina, Czech Republic, Denmark, Finland, Germany,Italy, Luxembourg, Norway, and Poland

  50. Extenuating Circumstances • Ducks and Geese don’t have gag reflexes • “...have sturdy throats that easily tolerate grains, grit, stones and inflexible gavage tubes.” (DownesNYTimes2005) • “I visited Hudson Valley Foie Gras last week, seeing gavage for the first time. I saw no pain or panic in Mr. Yanay's ducks, no quacking or frenzied flapping in the cool, dimly lighted open pens where a young woman with a gavage funnel did her work. The birds submitted matter-of-factly to a 15-inch tube inserted down the throat for about three seconds, delivering about a cup of corn pellets.” • (Downes 2005) • Judge for yourself: • https://www.youtube.com/watch?v=lh6ZDusOGwU • Instructor link

More Related