During the mid-part of the last decade, when the population growth rate was at its highest, the Phoenix area experienced rapid development and urban sprawl. The result has been an intensification of the Urban Heat Island effect. In this edition of Decades, author Sally Wittlinger discusses this uncomfortable consequence of urbanization.

In a desert city such as Phoenix, summertime heat is a way of life, but how much does the built environment contribute to the intensity of the heat on a summer night? In urbanized Phoenix, nights don’t cool down as much as in the surrounding rural areas and on more and more summer nights, the official Phoenix temperature fails to drop below 90 degrees. Climate plays a huge role in the comfort and quality of life of residents, with numerous implications for tourism, energy demand, water use, and the vulnerability of low-income families.

The transaction privilege tax (TPT), often referred to as the sales tax, is a major source of revenue for state and local governments in Arizona. The TPT is applied to numerous categories, such as contracting and utilities. The analysis in this paper is limited to the retail category, which accounts for half of the TPT collected by state government, and the restaurant and bar category, which contributes one-tenth of the TPT revenue.

The purpose of this brief report is to provide information about the past, present, and future of a very significant education reform program and tax increase, commonly known as Proposition 301. Coverage includes the history leading up to the ballot measure approved by Arizona voters in November 2000, its status approximately one year after it went into effect, and its prospects over a 20-year life span.