Relational Match to Sample (RMTS) is a common test of relational reasoning involving matching cards based on the relations “same” and “different”. Children below the age of five fail RMTS, even with corrective feedback. Given that success on RMTS depends on the ability to represent and compare ”same” and ”different”, such failure has been interpreted as indicative of the absence of these abilit...

We prove that there exists a class of crystalline insulators, which we call "fragile Mott insulators," which are not adiabatically connected to any sort of band insulator provided time-reversal and certain point-group symmetries are respected, but which are otherwise unspectacular in that they exhibit no topological order nor any form of fractionalized quasiparticles. Different fragile Mott ins...

Universal quantum computation can be achieved by simply performing single-qubit measurements on a highly entangled resource state, such as cluster states. The family of Affleck-Kennedy-Lieb-Tasaki states has recently been intensively explored and shown to provide restricted computation. Here, we show that the two-dimensional Affleck-Kennedy-Lieb-Tasaki state on a honeycomb lattice is a universa...

The culturally widespread verbal count list (“one, two, three...”), deployed in accord with what Gelman & Gallistel (1978) call the “counting principles,” represents the positive integers1. The counting principles provide an account of how the count list encodes the successor function; i.e. if a numeral “n” refers to cardinal value n and “p” immediately follows “n” in the count list then “p” re...

This paper uses a unique data set of monthly new vehicle sales by detailed model from 19782007, and implements a new identification strategy to estimate the effect of the price of gasoline on consumer demand for fuel economy. We control for unobserved vehicle and consumer characteristics by using within model-year changes in the price of gasoline and vehicle sales. We find a significant demand ...

A method is suggested for the calculation of the DeWitt-Seeley-Gilkey (DWSG) coefficients for the operator √ −∇2 + V (x) basing on a generalization of the pseudodifferential operator technique. The lowest DWSG coefficients for the operator √ −∇2 + V (x) are calculated by using the method proposed. It is shown that the method admits a generalization to the case of operators of the type (−∇2 + V ...

This is a continuation of and a development of a debate between John Keown and me. The issue discussed is whether, in Britain, an unpaid system of blood donation promotes and is justified by its promotion of altruism. Doubt is cast on the notions that public policies can, and, if they can, that they should, be aimed at the promotion and expression of altruism rather than of self-interest, espec...

We use the April 1993 Current Population Survey to examine the health insurance coverage decisions of the unemployed and to simulate the potential effects of the new Kassebaum-Kennedy legislation. After controlling for demographic characteristics, COBRA eligibility raises the probability of health insurance coverage by 0.095, while eligibility for spouse employer insurance increases the likelih...