Attraction of mutualists and defense against antagonists are critical challenges for most organisms and can be especially acute for plants with pollinating and non-pollinating flower visitors. Secondary compounds in flowers have been hypothesized to adaptively mediate attraction of mutualists and defense against antagonists, but this hypothesis has rarely been tested. The tissues of milkweeds (...

We analyze optimal policy design when firms' research activity may lead to socially harmful innovations. Public intervention, affecting the expected profitability of innovation, may both thwart the incentives to undertake research (average deterrence) and guide the use to which innovation is put (marginal deterrence). We show that public intervention should become increasingly stringent as the ...

No country so empowers its citizens to redress the social harms committed by others as does the United States. Compensating the injured and deterring future violations are frequently seen as complementary objectives of private suits. Our legal system further affirms its commitment to compensation and deterrence through modern joinder rules and class action procedures, not to mention contingency...

We analyze the entry of a new product into a vertically differentiated market in which an entrant and an incumbent compete in prices. Here the entry-deterrence strategies of the incumbent firm rely on “limit qualities.” With a sequential choice of quality, a quality-dependent marginal production cost, and a fixed entry cost, we relate the entry-quality decision and the entry-deterrence strategi...

We present a new agent-based model for the simulation of tax compliance and tax evasion behaviour (SIMULFIS). The main novelties of the model are the introduction of a ‘behavioural filter approach’ to model tax decisions, the combination of a set of different mechanisms to produce tax compliance (namely rational choice, normative commitments, and social influence), and the use of the concept of...

Securing automated teller machines (ATMs), as critical and complex infrastructure, requires a precise understanding of the associated threats. This paper reports on the application of attack-defense trees to model and analyze the security of ATMs. We capture the most dangerous multi-stage attack scenarios applicable to ATM structures, and establish a practical experience report, where we reflec...

while economic deterrence models are fully based on maximizing economic utility; social psychology models explain human behavior by examining the underlying attitudes, norms and beliefs. tax morale is defined as the intrinsic motivation to pay taxes. however, determinants of tax morale need to be investigated for a more comprehensive understanding of tax morale. in this paper we analyze the mos...