Capuchins can appreciate the purchasing power of tokens such as poker chips.
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Addessi, E., Mancini, A., Crescimbene, L., Padoa-Schioppa, C. & Visalberghi, E. PLoS ONE 3, e2414 (2008).
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Sanderson, K. Monkeys understand money. Nature (2008). https://doi.org/10.1038/news.2008.882