To constrain legislative taxing power, 16 U.S. state constitutions require a supermajority in both chambers to increase or impose taxes. Both supporters and opponents of the requirement argue that its effect fades away because states circumvent it in various ways, especially by raising fees that are not subject to the requirement. Existing literature, however, offers little and inconsistent evidence on whether the effect decays over time and whether the decay results from fee hikes. This paper documents legal cases to show the ways in which states have responded to the requirement, estimates whether the effects of the requirement decay over time, and tests if states raise fees instead of taxes after adopting such a requirement. Using state-level panel data, I find that the initial effectiveness of the requirement on tax burden does decay approximately a decade after enactment and that the decay is not the result of fee increases.

Parasites are essential components of ecosystems and can be instrumental in maintaining host diversity and populations; however, their role in trophic interactions has often been overlooked. Three apicomplexan parasite species of Sarcocystis (S. singaporensis, S. zamani, and S. villivillosi) use the reticulated python as their definitive hosts and several species within the Rattus genus as intermediate hosts, and they form a system useful for studying interactions between host–parasite and predator–prey relationships, as well as anthropogenic impacts on parasite transmission. Based on predictions from a 1998 survey, which detected an inverse relationship between urban development and Sarcocystis infection in Rattus, we tested the hypothesis that Sarcocystis transmission in Singapore will decrease over time due to anthropogenic activities. Despite a large proportion of the reticulated python diet consisting of Rattus species at all sizes of pythons, Sarcocystis infection rates decreased from 1998 to 2010. Pythons found in industrial areas had lower Sarcocystis infection rates, particularly in the western industrial area of Singapore Island. Average python size also decreased, with implications that we predict may disrupt host–parasite relationships. Anthropogenic activities such as habitat modification, fragmentation, and systematic removal and translocation of pythons have negative impacts on Sarcocystis transmission in Singapore, which in turn may augment pest rat populations. Trends observed may ultimately have negative impacts on human health and biodiversity in the region.