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The Tobin tax is a solution proposed by many economists for limiting the speculation in foreign exchange and stock markets and for making these markets stabler. In this paper we present a study on the effects of a transaction tax on one and on two related markets, using an artificial financial market based on heterogeneous agents. The microstructure of the market is composed of four kinds of traders: random traders, fundamentalists, momentum traders and contrarians, and the resources allocated to them are limited. In each market it is possible to levy a transaction tax. In the case of two markets, each trader can choose in which market to trade, and an attraction function is defined that drives their choice based on perceived profitability. We performed extensive simulations and found that the tax actually increases volatility and decreases trading volumes. These findings are discussed in the paper.

" 'If you want to know who you are and where you come from, follow the maíz.' That was the advice given to author Roberto Cintli Rodriguez when he was investigating the origins and migrations of Mexican peoples in the Four Corners region of the United States. Follow it he did, and his book Our Sacred Maíz Is Our Mother changes the way we look at Mexican Americans. Not so much peoples created as a result of war or invasion, they are people of the corn, connected through a seven-thousand-year old maíz culture to other Indigenous inhabitants of the continent. Using corn as the framework for discussing broader issues of knowledge production and history of belonging, the author looks at how corn was included in codices and Mayan texts, how it was discussed by elders, and how it is represented in theater and stories as a way of illustrating that Mexicans and Mexican Americans share a common culture. Rodriguez brings together scholarly and traditional (elder) knowledge about the long history of maíz/corn cultivation and culture, its roots in Mesoamerica, and its living relationship to Indigenous peoples throughout the continent, including Mexicans and Central Americans now living in the United States. The author argues that, given the restrictive immigration policies and popular resentment toward migrants, a continued connection to maíz culture challenges the social exclusion and discrimination that frames migrants as outsiders and gives them a sense of belonging not encapsulated in the idea of citizenship. The "hidden transcripts" of corn in everyday culture--art, song, stories, dance, and cuisine (maíz-based foods like the tortilla)--have nurtured, even across centuries of colonialism, the living maíz culture of ancient knowledge. "--