How do biological markets compare to the markets of economics?

Noë, Ronald (2016): How do biological markets compare to the markets of economics?

Abstract

After an introduction to biological markets written for non-biologists, I explore whether and to what extent natural markets, i.e. markets on which non-human traders exchange goods and services with members belonging to their own or to other species, can be compared to human ‘economic’ markets, i.e. the markets analysed by economists. Biological Market Theory (BMT) borrows jargon and ideas from economics, but was at least as much inspired by sexual selection theory, a collection of models of ‘mating markets’, including human mating markets. Here I ask two main questions: (1) Is there more than only a superficial resemblance between both types of markets? (2) Can the analysis of one yield insights about the other? First, I consider the different forms of human trading and markets and propose some biological ones to which these can best be compared, e.g. companies trading goods in markets shaped by ‘comparative advantage’ to underground nutrient exchange markets between plants and rhizobial bacteria and mycorrhizal fungi; job and retail markets with pollination, seed dispersal and protection markets between plants and insects; ‘embedded markets’ with grooming markets in non-human primates and so forth. Then I look at some phenomena that are considered to be exclusive to human markets, such as common currencies and binding contracts, and ask whether these are indeed that exclusive. Finally I look at the common ground: negotiations that take place on several types of markets, natural or not; the honesty of advertisements, which is recognised as a major problem for both human and non-human clients; the biological equivalent of the market – firm dichotomy and the importance of the costs of partner choice, which are known to economists as ‘transaction costs’ and to sexual selection theoreticians as ‘search costs’. I conclude that there are several good reasons to have a closer look at those properties that set human and biological markets apart, but certainly also at those features that make them comparable to each other.

• Item Type: MPRA Paper
• Language: English
• Keywords: cooperation, mutualism, trade, biological markets, mating markets, embedded markets, sexual selection, partner choice, currency, binding contract, negotiation, bargaining, honest advertisement, transaction costs, search costs, market – firm dichotomy
• Subjects: B - History of Economic Thought, Methodology, and Heterodox Approaches > B5 - Current Heterodox Approaches > B52 - Institutional ; Evolutionary; Z - Other Special Topics > Z1 - Cultural Economics ; Economic Sociology ; Economic Anthropology > Z13 - Economic Sociology ; Economic Anthropology ; Social and Economic Stratification

References

Alexander J, Alexander P (1991) What's a fair price? Price-setting and trading partnerships in Javanese markets. Man 26:493-512.

Alexander RD (1974) The evolution of social behavior. Annual Review of Ecology, Evolution, and Systematics 4:325-383.

Andersson M (1994) Sexual Selection. Monopgraphs in behavior and ecology. Princeton University Press, Princeton, NJ

Archetti M (2011) Contract theory for the evolution of cooperation: The right incentives attract the right partners. Journal of Theoretical Biology 269:201-207.

Argüello A, O'Brien MJ, van der Heijden MGA, Wiemken A, Schmid B, Niklaus PA (2016) Options of partners improve carbon for phosphorus trade in the arbuscular mycorrhizal mutualism. Ecology Letters 19:648–656.

Axelrod R, Hamilton WD (1981) The evolution of cooperation. Science 211:1390-1396.

Barrett L, Gaynor D, Henzi SP (2002) A dynamic interaction between aggression and grooming reciprocity among female chacma baboons. Animal Behaviour 63:1047-1053.

Barrett L, Henzi SP (2001) The utility of grooming in baboon troops. In: Noë R, van Hooff JARAM, Hammerstein P (eds) Economics in Nature. Social Dilemmas, Mate Choice and Biological Markets. Cambridge University Press, Cambridge, pp 119-145

Barrett L, Henzi SP, Weingrill T, Hill RA (1999) Market forces predict grooming reciprocity in female baboons. Proceedings of the Royal Society B-Biological Sciences 266:665-670.

Bell G (1986) The evolution of empty flowers. Journal of Theoretical Biology 118: 253-258.

Bergmüller R, Johnstone RA, Russell AF, Bshary R (2007) Integrating cooperative breeding into theoretical concepts of cooperation. Behavioural Processes 76:61-72.

Bever JD (2015) Preferential allocation, physio-evolutionary feedbacks, and the stability and environmental patterns of mutualism between plants and their root symbionts. New Phytologist 205: 1503-1514.

Bever JD, Richardson SC, Lawrence BM, Holmes J, Watson M (2009) Preferential allocation to beneficial symbiont with spatial structure maintains mycorrhizal mutualism. Ecology Letters 12:13-21.

Bshary R (2001) The cleaner fish market. In: Noë R, van Hooff JARAM, Hammerstein P (eds) Economics in Nature. Social Dilemmas, Mate Choice and Biological Markets. Cambridge University Press, Cambridge, pp 146-172.

Bshary R, Grutter AS, Willener AST, Leimar O (2008) Pairs of cooperating cleaner fish provide better service quality than singletons. Nature 455:964-966.

Bshary R, Noë R (2003) Biological Markets: the ubiquitous influence of partner choice on the dynamics of cleaner fish-client reef fish interactions. In: Hammerstein P (ed) Genetic and Cultural Evolution of Cooperation. MIT Press. Cambridge, Mass., pp 167-184.

Bshary R, Schäffer D (2002) Choosy reef fish select cleaner fish that provide high-quality service. Animal Behaviour 63:557-564.

Bücking H, Mensah JA, Fellbaum CR (2016) Common mycorrhizal networks and their effect on the bargaining power of the fungal partner in the arbuscular mycorrhizal symbiosis. Communicative & Integrative Biology 9:e1107684.

Bull JJ, Rice WR (1991) Distinguishing mechanisms for the evolution of co-operation. Journal of Theoretical Biology 149:63-74.

Buss DM, Schmitt DP (1993) Sexual Strategies Theory: An evolutionary perspective on human mating. Psychological Review 100:204-232.

Carne C, Wiper S, Semple S (2011) Reciprocation and interchange of grooming, agonistic support, feeding tolerance, and aggression in semi-free-ranging Barbary macaques. American Journal of Primatology 73:1127-1133.

Cheney DL, Seyfarth RM, Fischer J, Beehner J, Bergman T, Johnson SE, Kitchen DM, Palombit RA, Rendall D, Silk JB (2004) Factors affecting reproduction and mortality among baboons in the Okavango Delta, Botswana. Int J Primatol 25:401-428.

Coase RH (1937) The nature of the firm. Economica 4:386-405.

Collom E (2011) Motivations and Differential Participation in a Community Currency System: The Dynamics Within a Local Social Movement Organization. Sociological Forum 26:144-168.

Currie CR, Poulsen M, Mendenhall J, Boomsma JJ, Billen J (2006) Coevolved crypts and exocrine glands support mutualistic bacteria in fungus-growing ants. Science 311:81-83.

Currie CR, Scott JA, Summerbell RC, Malloch D (1999) Fungus-growing ants use antibiotic-producing bacteria to control garden parasites. Nature 398: 701-704.

Davidson SK, Koropatnick TA, Kossmehl R, Sycuro L, McFall-Ngai MJ (2004) NO means 'yes' in the squid-vibrio symbiosis: nitric oxide (NO) during the initial stages of a beneficial association. Cellular Microbiology 6:1139-1151.

Davies NB, Krebs JR, West S (2012) An introduction to behavioural ecology. 4th edn. Wiley-Blackwell, Chichester.

Dawkins R (1976) The selfish gene. Oxford University Press, Oxford.

de Waal FBM (2000) Attitudinal reciprocity in food sharing among brown capuchin monkeys. Animal Behaviour 60:253-261.

Dellinger Agnes S, Penneys Darin S, Staedler Yannick M, Fragner L, Weckwerth W, Schönenberger J (2014) A specialized bird pollination system with a bellows mechanism for pollen transfer and staminal food body rewards. Current Biology 24:1615-1619.

Denison RF (2000) Legume sanctions and the evolution of symbiotic cooperation by rhizobia. The American Naturalist 156:567-576.

Dunbar RIM (2010) The social role of touch in humans and primates: Behavioural function and neurobiological mechanisms. Neuroscience & Biobehavioral Reviews 34:260-268.

Emlen ST, Oring LW (1977) Ecology, sexual selection, and the evolution of mating systems. Science 197:215-223. Fellbaum CR, Mensah JA, Cloos AJ, Strahan GE, Pfeffer PE, Kiers ET, Bücking H (2014) Fungal nutrient allocation in common mycorrhizal networks is regulated by the carbon source strength of individual host plants. New Phytologist 203:646-656.

Fischer EA (1988) Simultaneous hermaphroditism, tit-for-tat, and the evolutionary stability of social systems. Ethology and Sociobiology 9:119-136.

Franklin O, Näsholm T, Högberg P, Högberg MN (2014) Forests trapped in nitrogen limitation – an ecological market perspective on ectomycorrhizal symbiosis. New Phytologist 203:657–666.

Fraser B (2013) False advertising in biological markets: partner choice and the problem of reliability. In: Sterelny K, Joyce R, Calcott B, Fraser B (eds) Evolution, Cooperation and Complexity. MIT Press, Cambridge, Mass.

Frenzen JK, Davis HL (1990) Purchasing behavior in embedded markets. Journal of Consumer Research 17:1-12. Friesen ML (2012) Widespread fitness alignment in the legume–rhizobium symbiosis. New Phytologist 194:1096-1111.

Fruteau C, van de Waal E, van Damme E, Noë R (2011) Infant access and handling in sooty mangabeys and vervet monkeys. Animal Behaviour 81:153-161.

Fruteau C, Voelkl B, van Damme E, Noë R (2009) Supply and demand determine the market value of food providers in wild vervet monkeys. Proceedings of the National Academy of Sciences of the United States of America 106:12007-12012.

Gangestad SW, Simpson JA (2000) The evolution of human mating: Trade-offs and strategic pluralism. Behavioral and brain sciences 23:573-587.

Gardner A, Grafen A (2009) Capturing the superorganism: a formal theory of group adaptation. Journal of Evolutionary Biology 22:659-671.

Gilbert FS, Haines N, Dickson K (1991) Empty flowers. Funct Ecol 5: 29-39.

Glimcher PW (2003) Decisions, Uncertainty, and the Brain. The Science of Neuroeconomics. MIT Press - Bradford Books, Cambridge, Mass.

Grafen A (1990) Biological signals as handicaps. Journal of Theoretical Biology 144:517-546.

Granovetter M (1985) Economic-action and social-structure - the problem of embeddedness. American Journal of Sociology 91:481-510.

Greene E, Lyon BE, Muehter VR, Ratcliffe L, Oliver SJ, Boag PT (2000) Disruptive sexual selection for plumage coloration in a passerine bird. Nature 407:1000-1003.

Grman E, Robinson TMP, Klausmeier CA (2012) Ecological specialization and trade affect the outcome of negotiations in mutualism. The American Naturalist 179:567-581.

Grossbard-Shechtman SA (1993) On the economics of marriage: A theory of marriage, labor, and divorce. Westview Press, Boulder and Oxford.

Grutter AS (1999) Cleaner fish really do clean. Nature 398:672-673.

Grutter AS, Bshary R (2003) Cleaner wrasse prefer client mucus: support for partner control mechanisms in cleaning interactions. Proceedings of the Royal Society of London Series B: Biological Sciences 270:S242-S244.

Gubry-Rangin C, Garcia M, Béna G (2010) Partner choice in Medicago Truncatula–Sinorhizobium symbiosis. Proceedings of the Royal Society B: Biological Sciences 277:1947-1951.

Gumert MD (2007) Grooming and infant handling interchange in Macaca fascicularis: the relationship between infant supply and grooming payment. Int J Primatol 28:1059-1074.

Guyer JI (2012) Soft currencies, cash economies, new monies: Past and present. Proceedings of the National Academy of Sciences 109:2214-2221.

Hammerstein P, Noë R (2016) Biological trade and markets. Philosophical Transactions of the Royal Society of London B: Biological Sciences 371.

Hammerstein P, Parker GA (1987) Sexual selection: games between the sexes. In: Bradbury, J.W.;Andersson, M.B.(eds) Sexual selection: testing the alternatives. John Wiley & Sons, pp. 119-142).

Heath KD, Tiffin P (2009) Stabilizing mechanisms in a legume-rhizobium mutualism. Evolution 63:652-662.

Henrich J, Boyd R (2001) Why people punish defectors: Weak conformist transmission can stabilize costly enforcement of norms in cooperative dilemmas. Journal of Theoretical Biology 208:79-89.

Henzi SP, Barrett L (2002) Infants as a commodity in a baboon market. Animal Behaviour 63:915-921.

Henzi SP, Barrett L, Gaynor D, Greeff J, Weingrill T, Hill RA (2003) Effect of resource competition on the long-term allocation of grooming by female baboons: evaluating Seyfarth's model. Animal Behaviour 66:931-938.

Kaltenpoth M, Roeser-Mueller K, Koehler S, Peterson A, Nechitaylo TY, Stubblefield JW, Herzner G, Seger J, Strohm E (2014) Partner choice and fidelity stabilize coevolution in a Cretaceous-age defensive symbiosis. Proceedings of the National Academy of Sciences 111:6359-6364.

Kiers ET, Duhamel M, Beesetty Y, Mensah JA, Franken O, Verbruggen E, Fellbaum CR, Kowalchuk GA, Hart MM, Bago A, Palmer TM, West SA, Vandenkoornhuyse P, Jansa J, Bücking H (2011) Reciprocal rewards stabilize cooperation in the mycorrhizal symbiosis. Science 333:880-882.

Kiers ET, van der Heijden MGA (2006) Mutualistic stability in the arbuscular mycorrhizal symbiosis: Exploring hypotheses of evolutionary cooperation. Ecology 87:1627-1636.

Koyama N, Takahata Y, Huffman M, Norikoshi K, Suzuki H (1992) Reproductive parameters of female Japanese macaques: Thirty years data from the arashiyama troops, Japan. Primates 33:33-47.

Krams I, Krama T, Igaune K, Mänd R (2008) Experimental evidence of reciprocal altruism in the pied flycatcher. Behav Ecol Sociobiol 62:599-605.

Le Velly R (2002) "Embeddedness", a sociological theory of market transactions. Sociologie Du Travail 44:37-53. Leigh EG (1971) Adaptation and diversity; natural history and the mathematics of evolution. Freeman, San Francisco, CA.

Leigh Jr EG (2010) The group selection controversy. Journal of Evolutionary Biology 23:6-19.

Lie J (1991) Embedding Polanyi's market society. Sociological Perspectives 34:219-235.

Maynard Smith J (1974) The theory of games and the evolution of animal conflicts. Journal of Theoretical Biology 47:209-221.

Maynard Smith J (1976) Sexual selection and the handicap principle. Journal of Theoretical Biology 57:239-242. Maynard Smith J (1978) The handicap principle - a comment. Journal of Theoretical Biology 70:251-252.

Maynard Smith J (1982) Evolution and the theory of games. Cambridge Univ. Press, Cambridge.

Maynard Smith J, Price GR (1973) The logic of animal conflict. Nature 246:15-18.

Maynard Smith J, Szathmáry E (1995) The major transitions in evolution. Oxford University Press, Oxford McCall C, Singer T (2012) The animal and human neuroendocrinology of social cognition, motivation and behavior. Nature Neuroscience 15:681-688.

McFall-Ngai M (2008a) Hawaiian bobtail squid. Current Biology 18:R1043-R1044.

McFall-Ngai M (2008b) Host-microbe symbiosis: The squid-vibrio association - A naturally occurring, experimental model of animal/bacterial partnerships. Gi Microbiota and Regulation of the Immune System 635:102-112.

McFall-Ngai M (2014) Divining the essence of symbiosis: Insights from the squid-vibrio model. PLoS Biol 12:e1001783.

McFall-Ngai M, Heath-Heckman EAC, Gillette AA, Peyer SM, Harvie EA (2012) The secret languages of coevolved symbioses: Insights from the Euprymna scolopes-Vibrio fischeri symbiosis. Seminars in Immunology 24:3-8.

McFall-Ngai MJ (2000) Negotiations between animals and bacteria: the 'diplomacy' of the squid-vibrio symbiosis. Comparative Biochemistry and Physiology a-Molecular and Integrative Physiology 126:471-480.

Metz M, Klump G, Friedl T (2007) Temporal changes in demand for and supply of nests in red bishops (Euplectes orix): dynamics of a biological market. Behav Ecol Sociobiol 61:1369-1381.

Nash J (1951) Non-cooperative games. Annals of Mathematics 54:286-295.

Noë R (2001) Biological markets: partner choice as the driving force behind the evolution of cooperation. In: Noë R, van Hooff JARAM, Hammerstein P (eds) Economics in Nature. Social Dilemmas, Mate Choice and Biological Markets. (eds Noë, R., van Hooff, J.A.R.A.M & Hammerstein, P.) Cambridge UP pp 93-118. Cambridge University Press, Cambridge, pp 93-118.

Noë R (2006) Cooperation experiments: coordination through communication versus acting apart together. Animal Behaviour 71:1-18.

Noë R, Hammerstein P (1994) Biological markets: supply and demand determine the effect of partner choice in cooperation, mutualism and mating. Behav Ecol Sociobiol 35:1-11.

Noë R, Hammerstein P (1995) Biological markets. Trends in Ecology and Evolution 10:336-339.

Noë R, van Schaik CP, van Hooff JARAM (1991) The market effect: an explanation for pay-off asymmetries among collaborating animals. Ethology 87:97-118.

North DC (1990) Institutions, institutional change and economic performance. Cambridge University Press, Cambridge.

Oliver P (1980) Rewards and punishments as selective incentives for collective action: theoretical investigations. American journal of sociology:1356-1375. Packer C (1977) Reciprocal altruism in Papio anubis. Nature 265:441-443.

Pawlowski B, Dunbar RIM (1999) Impact of market value on human mate choice decisions. Proceedings of the Royal Society, London, B 266:281-285.

Pawlowski B, Dunbar RIM (2001) Human mate choice strategies. In: Noë R, van Hooff JARAM, Hammerstein P (eds) Economics in Nature. Social Dilemmas, Mate Choice and Biological Markets.Cambridge University Press, Cambridge, pp 187-202.

Pollet TV, Nettle D (2008) Driving a hard bargain: sex ratio and male marriage success in a historical US population. Biology Letters 4:31-33.

Pollet TV, Nettle D (2009) Market forces affect patterns of polygyny in Uganda. Proceedings of the National Academy of Sciences 106:2114-2117.

Port M, Clough D, Kappeler PM (2009) Market effects offset the reciprocation of grooming in free-ranging redfronted lemurs, Eulemur fulvus rufus. Animal Behaviour 77:29-36.

Queller DC, Ponte E, Bozzaro S, Strassmann JE (2003) Single-gene greenbeard effects in the social amoeba Dictyostelium discoideum. Science 299:105-106.

Queller DC, Strassmann JE (2006) Models of cooperation. Journal of Evolutionary Biology 19:1410-1412.

Queller DC, Strassmann JE (2009) Beyond society: the evolution of organismality. Philosophical Transactions of the Royal Society B: Biological Sciences 364:3143-3155. Real L (1990) Search theory and mate choice: I. Models of single-sex discrimination. The American Naturalist 136:376-405.

Real L (1991) Search theory and mate choice: II. Mutual interaction, assortative mating, and equilibrium variation in male and female fitness. The American Naturalist 138:901-917.

Richerson PJ, Boyd R (2005) Not by genes alone. How culture transformed human evolution. University of Chicago Press, Chicago.

Richerson PJ, Boyd RT, Henrich J (2003) Cultural evolution of human cooperation. In: In: Hammerstein, P. (ed). Genetic and Cultural Evolution of Cooperation. MIT Press, Cambridge, Mass. pp. 357-388.

Richey S (2007) Manufacturing trust: Community currencies and the creation of social capital. Political Behavior 29:69-88.

Rilling JK, Sanfey AG (2011) The neuroscience of social decision-making. Annual Review of Psychology 62:23-48.

Roberts G, Sherratt TN (1998) Development of cooperative relationships through increasing investment. Nature 394:175-179.

Sachs JL, Mueller UG, Wilcox TP, Bull JJ (2004) The evolution of cooperation. Quarterly Review of Biology 79:135-160.

Schaffner C, Aureli F (2005) Embraces and grooming in captive spider monkeys. Int J Primatol 26:1093-1106.

Schino G, Aureli F (2009) Reciprocal altruism in primates: partner choice, cognition, and emotions. Advances in the Study of Behavior 39:45-69.

Schott S, Valdebenito B, Bustos D, Gomez-Porras JL, Sharma T, Dreyer I (2016) Cooperation through competition - Dynamics and microeconomics of a minimal nutrient trade system in arbuscular mycorrhizal symbiosis. Frontiers in Plant Science 7.

Seyfang G (2004) Working outside the box: Community currencies, time banks and social inclusion. Journal of Social Policy 33:49-71.

Seyfarth RM, Cheney DL (1984) Grooming, alliances and reciprocal altruism in vervet monkeys. Nature 308:541-543.

Sherratt TN, Roberts G (2002) The stability of cooperation involving variable investment. Journal of Theoretical Biology 215:47-56.

Sick C, Carter AJ, Marshall HH, Knapp LA, Dabelsteen T, Cowlishaw G (2014) Evidence for varying social strategies across the day in chacma baboons. Biology Letters 10.

Simms EL, Taylor DL (2002) Partner choice in nitrogen-fixation mutualisms of legumes and rhizobia. Integrative and Comparative Biology 42:369-380.

Simpson B, McGrimmon T (2008) Trust and embedded markets: A multi-method investigation of consumer transactions. Social Networks 30:1-15.

Slater KY, Schaffner CM, Aureli F (2007) Embraces for infant handling in spider monkeys: evidence for a biological market? Animal Behaviour 74:455-461.

Smaldino PE (2014) The cultural evolution of emergent group-level traits. Behavioral and Brain Sciences 37:243-254.

Smuts B, Nicolson N (1989) Reproduction in wild female olive baboons. American Journal of Primatology 19:229-246.

Spence AM (1973) Job market signaling. The Quarterly Journal of Economics 87:355-374.

Strassmann JE, Queller DC (2010) The social organism: Congresses, parties, and committees. Evolution 64:605-616.

Taylor LD (2013) Male partner selectivity, romantic confidence, and media depictions of partner scarcity. Evolutionary Psychology 11:36-49.

Testart A (2013) Reconstructing social and cultural evolution: The case of dowry in the Indo-European area. Current Anthropology 54:23-50.

Trivers RL (1971) The evolution of reciprocal altruism. Quarterly Review of Biology 46:35-57.

van Schaik CP (1983) Why are diurnal primates living in groups? Behaviour 87:120-144.

van Schaik CP, van Hooff JARAM (1983) On the ultimate causes of primate social systems. Behaviour 85:91-117.

Varman R, Costa JA (2008) Embedded Markets, Communities, and the Invisible Hand of Social Norms. Journal of Macromarketing 28:141-156.

Veblen T (1899) The theory of the leisure class: An economic study of institutions. In: New York: The Macmillan Company. 416 pages ; Penguin Books; Reprint edition (March 1, 1994).

Verbruggen E, Mouden CE, Jansa J, Akkermans G, Bücking H, West SA, Kiers ET (2012) Spatial structure and interspecific cooperation: theory and an empirical test using the mycorrhizal mutualism. The American Naturalist 179:E133-E146.

Vinicius L, Migliano AB (2016) Reproductive market values explain post-reproductive lifespans in men. Trends in Ecology & Evolution 31:172-175.

Visick KL, McFall-Ngai MJ (2000) An exclusive contract: Specificity in the Vibrio fischeri Euprymna scolopes partnership. Journal of Bacteriology 182:1779-1787.

Voland E (1995) Reproductive decisions viewed from an evolutionarily informed historical demography. In: Dunbar, R. I. M. (ed) Human Reprodcutive Decisions. Biological and Social Perspectives. MacMillan Houndmills & London.

Voland E, Dunbar RIM (1995) Resource competition and reproduction. The relationship between economic and parental strategies in the Krummhörn population (1720 - 1874). Hum Nat 6:33-49.

Voland E, Engel C (1990) Female choice in humans: a conditional mate selection strategy of the Krummhoern women (Germany, 1720-1874). Ethology 84:144-154.

von Arx M, Goyret J, Davidowitz G, Raguso RA (2012) Floral humidity as a reliable sensory cue for profitability assessment by nectar-foraging hawkmoths. Proceedings of the National Academy of Sciences 109:9471-9476.

von Neumann J, Morgenstern O (1944) Theory of games and economic behavior. Princeton University Press, Princeton.

Waal E, Spinelli M, Bshary R, Ros AFH, Noë R (2013) Negotiations over grooming in wild vervet monkeys (Chlorocebus pygerythrus). Int J Primatol 34:1153-1171.

Walker G, Weber D (1984) A transaction cost approach to make-or-buy decisions. Administrative Science Quarterly 29:373-391.

Wang YL, Dunn AK, Wilneff J, McFall-Ngai MJ, Spiro S, Ruby EG (2010) Vibrio fischeri flavohaemoglobin protects against nitric oxide during initiation of the squid-Vibrio symbiosis. Molecular Microbiology 78:903-915.

Watts DP (2010) Dominance, power, and politics in nonhuman and human primates. In: Kappeler PM, Silk J (eds) Mind the Gap. Tracing the Origins of Human Universals Springer, Berlin, pp 109-138.

Wei W, Qi X, Garber PA, Guo S, Zhang P, Li B (2013) Supply and demand determine the market value of access to infants in the Golden Snub-Nosed monkey (Rhinopithecus roxellana). PLoS ONE 8:e65962.

Werner GDA, Kiers ET (2015) Partner selection in the mycorrhizal mutualism. New Phytologist 205:1437-1442. Werner GDA, Strassmann JE, Ivens ABF, Engelmoer DJP, Verbruggen E, Queller DC, Noë R, Johnson NC, Hammerstein P, Kiers ET (2014) Evolution of microbial markets. Proceedings of the National Academy of Sciences 111:1237-1244.

West SA, El Mouden C, Gardner A (2011) Sixteen common misconceptions about the evolution of cooperation in humans. Evolution and Human Behavior 32:231-262. West SA, Griffin AS, Gardner A (2007a) Evolutionary explanations for cooperation. Current Biology 17:R661-R672.

West SA, Griffin AS, Gardner A (2007b) Social semantics: altruism, cooperation, mutualism, strong reciprocity and group selection. Journal of Evolutionary Biology 20:415-432.

Weyl EG, Frederickson ME, Yu DW, Pierce NE (2010) Economic contract theory tests models of mutualism. Proceedings of the National Academy of Sciences 107:15712-15716.

Wilkinson DM (2001) Mycorrhizal evolution. Trends in Ecology & Evolution 16:64-65.

Wilkinson GS (1984) Reciprocal food sharing in the vampire bat. Nature 308:181-184.

Williamson OE (1979) Transaction-cost economics: the governance of contractual relations. Journal of law and economics 22:233-261.

Williamson, O. E. (2005). Transaction cost economics. In C. Ménard & M. M. Shirley (Eds.), Handbook of new institutional economics (pp. 41-65). Heidelberg: Springer.

Wubs M, Bshary R, Lehmann L (2016) Coevolution between positive reciprocity, punishment, and partner switching in repeated interactions. Proceedings of the Royal Society of London B: Biological Sciences 283.

Wyatt GAK, Kiers ET, Gardner A, West SA (2014) A biological market analysis of the plant-mycorrhizal symbiosis. Evolution 68:2603-2618.

Wyatt GAK, Kiers ET, Gardner A, West SA (2016) Restricting mutualistic partners to enforce trade reliance. Nature Commununications 7.

Yamagishi T (1986) The provision of a sanctioning system as a public good. Journal of Personality and Social Psychology 51:110-116.

Zahavi A (1975) Mate selection - a selection for a handicap. Journal of Theoretical Biology 53:205-214.

Zahavi A (1977) The cost of honesty (further remarks on the handicap principle). Journal of Theoretical Biology 67:603-605.