The Delegation Perspective on Representative Democracy

Why do political constituencies delegate decision power to representative assemblies? And how is the size of such assemblies determined? We analyze these questions of constitutional design in a model with voters learning their preferred alternative only after engaging in costly information gathering. We show that there is an optimal assembly size that would be chosen at a constitutional stage. This implies a relationship between assembly and constituency size. We then compared this relationship to actual data. Fitting a single parameter to the data, we show that our model can explain the actual relationship between assembly and constituency size quite well.Constitutional Design, Representative Democracy, Parliament Size, Information Costs

NASA AMES infrared detector assemblies

Silicon: Gallium infrared detector assemblies were designed, fabricated, and tested using techniques representative of those employed for hybrid arrays to determine the suitability of this candidate technology for infrared astronomical detector array applications. Both the single channel assembly and the assembly using a 32 channel CMOS multiplexer are considered. The detector material was certified to have a boron background of less than 10 to the 13th power atoms/sq cm counter doped with phosphorus. The gallium concentration is 2 x 10 to the 16th power atoms/cu cm

Phase transitions in systems of self-propelled agents and related network models

An important characteristic of flocks of birds, school of fish, and many similar assemblies of self-propelled particles is the emergence of states of collective order in which the particles move in the same direction. When noise is added into the system, the onset of such collective order occurs through a dynamical phase transition controlled by the noise intensity. While originally thought to be continuous, the phase transition has been claimed to be discontinuous on the basis of recently reported numerical evidence. We address this issue by analyzing two representative network models closely related to systems of self-propelled particles. We present analytical as well as numerical results showing that the nature of the phase transition depends crucially on the way in which noise is introduced into the system.Comment: Four pages, four figures. Submitted to PR

Political culture in the Holy Roman Empire

This article reviews six essay collections and one monograph on late medieval and early modern political culture in the Holy Roman Empire. Following a general survey of historiographical trends and a discussion of the specific contributions of the works under review (covering topics from international relations, state formation and the role of language to representative assemblies and the exercise of power in towns and villages), it attempts a preliminary sketch of the basic parameters of pre-modern politics. Prominent insights include shifts in the balance between oral, ritual and written communication, the significance of informal bonds and the negotiated quality of developments at all levels of government. The conclusion assesses the potential of the ‘new’ political history and calls for renewed efforts to link discourses, representations and perceptions to the norms, structures and socio-economic conditions with which they interacted

The Delegation Perspective on Representative Democracy

Why do political constituencies delegate decision power to representative assemblies? And how is the size of such assemblies determined? We analyze these questions of constitutional design in a model with voters learning their preferred alternative only after engaging in costly information gathering. We show that there is an optimal assembly size that would be chosen at a constitutional stage. This implies a relationship between assembly and constituency size. We then compared this relationship to actual data. Fitting a single parameter to the data, we show that our model can explain the actual relationship between assembly and constituency size quite well

Hierarchical self-assembly of di-, tri- and tetraphenylalanine peptides capped with two fluorenyl functionalities: from polymorphs to dendrites

Homopeptides with 2, 3 and 4 phenylalanine (Phe) residues and capped with fluorenylmethoxycarbonyl and fluorenylmethyl esters at the N-terminus and C-terminus, respectively, have been synthesized to examine their self-assembly capabilities. Depending on the conditions, the di-and triphenylalanine derivatives self-organize into a wide variety of stable polymorphic structures, which have been characterized: stacked braids, doughnut-like shapes, bundled arrays of nanotubes, corkscrew-like shapes and spherulitic microstructures. These highly aromatic Phe-based peptides also form incipient branched dendritic microstructures, even though they are highly unstable, making their manipulation very difficult. Conversely, the tetraphenylalanine derivative spontaneously self-assembles into stable dendritic microarchitectures made of branches growing from nucleated primary frameworks. The fractal dimension of these microstructures is similar to 1.70, which provides evidence for self-similarity and two-dimensional diffusion controlled growth. DFT calculations at the M06L/6-31G(d) level have been carried out on model beta-sheets since this is the most elementary building block of Phe-based peptide polymorphs. The results indicate that the antiparallel beta-sheet is more stable than the parallel one, with the difference between them growing with the number of Phe residues. Thus, the cooperative effects associated with the antiparallel disposition become more favorable when the number of Phe residues increases from 2 to 4, while those of the parallel disposition remained practically constant.Peer ReviewedPostprint (author's final draft

Conference Talk. Bertelsmann Policy Brief 04.2019

Commission President Ursula von der Leyen has announced a two-year Conference on the Future of Europe. Even citizens ought to participate. But how? In order to make participatory democracy a reality, it is essential to avoid only paying lip-service to the idea of participation — and give citizens a real say

Public Spending, By The People: Participatory Budgeting in the United States and Canada in 2014-15

From 2014 to 2015, more than 70,000 residents across the United States and Canada directly decided how their cities and districts should spend nearly $50 million in public funds through a process known as participatory budgeting (PB). PB is among the fastest growing forms of public engagement in local governance, having expanded to 46 communities in the U.S. and Canada in just 6 years.PB is a young practice in the U.S. and Canada. Until now, there's been no way for people to get a general understanding of how communities across the U.S. implement PB, who participates, and what sorts of projects get funded. Our report, "Public Spending, By the People" offers the first-ever comprehensive analysis of PB in the U.S. and Canada.Here's a summary of what we found:Overall, communities using PB have invested substantially in the process and have seen diverse participation. But cities and districts vary widely in how they implemented their processes, who participated and what projects voters decided to fund. Officials vary in how much money they allocate to PB and some communities lag far behind in their representation of lower-income and less educated residents.The data in this report came from 46 different PB processes across the U.S. and Canada. The report is a collaboration with local PB evaluators and practitioners. The work was funded by the Democracy Fund and the Rita Allen Foundation, and completed through a research partnership with the Kettering Foundation