The Fast Plasma Investigation (FPI) was developed for flight on the Magnetospheric Multiscale (MMS) mission to measure the differential directional flux of magnetospheric electrons and ions with unprecedented time resolution to resolve kinetic-scale plasma dynamics. This increased resolution has been accomplished by placing four dual 180-degree top hat spectrometers for electrons and four dual 180-degree top hat spectrometers for ions around the periphery of each of four MMS spacecraft. Using electrostatic fieldof-view deflection, the eight spectrometers for each species together provide 4pi-sr field-ofview with, at worst, 11.25-degree sample spacing. Energy/charge sampling is provided by swept electrostatic energy/charge selection over the range from 10 eV/q to 30000 eV/q. The eight dual spectrometers on each spacecraft are controlled and interrogated by a single block redundant Instrument Data Processing Unit, which in turn interfaces to the observatory's Instrument Suite Central Instrument Data Processor. This paper describes the design of FPI, its ground and in-flight calibration, its operational concept, and its data products.

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Studies of state fiscal and budgetary policies often use balanced budget requirements (BBRs) as explanatory variables. While current measures laid the crucial groundwork for a basic understanding of state BBRs, their lack of comprehensiveness threatens the validity of empirical work. Based on comprehensive legal research, this article offers a framework for analyzing state requirements: each state's BBRs form a coherent system for achieving budget balance through budget cycles; a fully developed BBR system offers a three‐line construct against imbalance; and the more complete, developed, and explicit a BBR system is, the more stringent it will be in achieving budgetary balance.

Fiscal transparency and citizen participation in budgeting processes are widely promoted as means toward the ends of democratic accountability and responsiveness in the allocation and use of public funds. In the past decade, academics and practitioners enthusiastic about e-government have emphasized the potential for using information technology to enhance democratic governance. Putting these two streams of public administration theory and practice together, the authors developed criteria for assessing e-budgeting efforts and applied them to a sample of Web sites operated by state and local governments. Although practitioners are ahead of academics in exploring the potential of e-government for improving fiscal accountability and responsiveness, practice lags behind the relevant basic recommendations of the Government Finance Officers Association. This finding leads to research and practice agendas aimed at enhancing the use of egovernment to enhance fiscal transparency and participation.

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