Per Martin-Löf's work on the development of constructive type theory has been of huge significance in the fields of logic and the foundations of mathematics. It is also of broader philosophical significance, and has important applications in areas such as computing science and linguistics. This volume draws together contributions from researchers whose work builds on the theory developed by Martin-Löf over the last twenty-five years. As well as celebrating the anniversary of the birth of the subject it covers many of the diverse fields which are now influenced by type theory. It is an invaluable record of areas of current activity, but also contains contributions from N. G. de Bruijn and William Tait, both important figures in the early development of the subject. Also published for the first time is one of Per Martin-Löf's earliest papers.

This book explores why some members of Congress are more effective than others at navigating the legislative process and what this means for how Congress is organized and what policies it produces. Craig Volden and Alan E. Wiseman develop a new metric of individual legislator effectiveness (the Legislative Effectiveness Score) that will be of interest to scholars, voters, and politicians alike. They use these scores to study party influence in Congress, the successes or failures of women and African Americans in Congress, policy gridlock, and the specific strategies that lawmakers employ to advance their agendas.

How do issues end up on the agenda? Why do lawmakers routinely invest in program oversight and broad policy development? What considerations drive legislative policy change? For many, Congress is an institution consumed by partisan bickering and gridlock. Yet the institution's long history of addressing significant societal problems - even in recent years - seems to contradict this view. Congress and the Politics of Problem Solving argues that the willingness of many voters to hold elected officials accountable for societal conditions is central to appreciating why Congress responds to problems despite the many reasons mustered for why it cannot. The authors show that, across decades of policy making, problem-solving motivations explain why bipartisanship is a common pattern of congressional behavior and offer the best explanation for legislative issue attention and policy change.

In Parliament and Congress the constitutional background and the procedures are described and where possible compared in an entirely fresh look at the two legislatures. Though their constitutional positions and development are quite distinct, they nevertheless have much in common historically and face many of the same contemporary problems.