We present a theory of spatial development. Manufacturing and services …rms located in a continuous geographic area choose each period how much to innovate. Firms trade subject to transport costs and technology di¤uses spatially across locations. The result is a spatial endogenous growth theory that can shed light on the link between the evolution of economic activity over time and space. We ap...

LetA be a C∗ algebra such as the algebra of quasi-local observables of a quantum spin system on Z, and suppose {αt}t∈R is a strongly continuous one-parameter group of automorphisms of A, which we will refer to as the dynamics of the system. The examples we have in mind are the dynamics of a quantum spin system generated by a not-too-long-range interaction Φ, e.g., one that satsifies, for some λ...

the literature on the life and works of Wagner is already extensive and we are told that he ranks third in bibliographical status to Jesus and Napoleon. But much of this is rather diffuse and turgid so that it is a great pleasure to find that Bryan Magee has now produced a Wagnerian analysis refreshing in its clarity, directness and brevity. This little monograph consists of five essays dealing...

We present an improved implementation of the Wagner-Whitin algorithm for economic lot-sizing problems based on the planning-horizon theorem and the Economic- Part-Period concept. The proposed method of this paper reduces the burden of the computations significantly in two different cases. We first assume there is no backlogging and inventory holding and set-up costs are fixed. The second model ...

It is well established that two predictor cues (A and B) of a common outcome interact in that the judgement of the relationship between each cue and the outcome is influenced by the pairing history of the other cue with that outcome. For example, when the contingency of A with an outcome is weaker than the contingency of B with that outcome, the rating of the predictiveness of A is reduced rela...