Measuring market power in the Greek food and beverages manufacturing industry

This paper measures the degree of market power of the Greek food and beverages manufacturing industry over the period 1983–2007 at the three-digit SIC level. The present study also estimates the “deadweight” loss and the reduction of consumers’ income due to the possible existence of market power in the Greek food and beverages manufacturing industry. Based on Bresnahan’s (1989) conjectural variation model, three different approaches are used to investigate competitive conditions of the Greek food and beverages manufacturing industry. The first approach assesses the extent of market power of the whole industry over the period 1983–2007; the second approach tests the degree of market power in each one of the nine sectors of the industry over the whole period, i.e. 1983–2007; and the third one estimates the extent of market power for the whole Greek food and beverages manufacturing industry for specific sub-periods of the period 1983–2007. The methodology of Dickson and Yu (1989) is adopted to measure the welfare losses. The empirical results indicate the presence of some degree of market power in the whole Greek food and beverages manufacturing industry as well as in each one sector of the industry during the period 1983– 2007 and, as a result, the existence of welfare losses. In addition, the empirical findings support the presence of some degree of market power for each sub-period of the period 1983– 2007 in the whole Greek food and beverages manufacturing industry and the existence of welfare losses.Conjectural variation, Greek food and beverages manufacturing industry, Market power, Welfare losses, Agribusiness, D43, D60, L66, Q10,

A land-use transport-interaction framework for large scale strategic urban modeling

We introduce a family of land use transportation interaction (LUTI) models which enable future employment, population and flows or trips between these activities to be explained and predicted. We begin by focusing on the generic spatial interaction model, noting the ways in which its components reflect demand and supply at different locations measured in terms of employment and working population. This suggests an equilibrium structure which is our starting point in developing a simplified version of the model which we extend to deal with four different activity sectors – housing, retail activities, schools, and health facilities. We use this generic structure to develop four related versions of the generic LUTI model equations for residential populations, retailing, education and hospitals which are all driven by employment in terms of where people live and work. This constitutes our integrated framework that we use in calibrating, that is fine-tuning the model to three urban areas (cities) in Europe: to Oxford and its county, Turin and its region, and Athens in its hinterland of Attica reflecting population volumes from 700,000, 1.7 million and 3.8 million persons respectively. In each case, we use the models to predict the impact of different scenarios – new housing developments in Oxfordshire, new universities and metro lines in Turin, and economic development in the Athens region. We describe the details of these scenarios in Supplementary Information (SI) which shows the versatility of using the models to examine such impacts and we conclude with directions for improving the various models and nesting them at different scales within the land use-transport planning process

Reconsidering urban development: the role of local self-organized groups in urban open green space upgrade

In the city of Thessaloniki, the co-creation of ‘an inclusive city’, which will ‘empower citizens and community-led projects... and enable co- creation in open and public spaces’, appears as one of the four main goals of the Resilience Strategy of the city, ‘Thessaloniki 2030’, published in 2017. Within this frame, and in conjunction with the need of open green spaces that Thessaloniki has, this paper is an attempt to identify and highlight the contribution of design self-organized groups to the upgrade of the urban environment of the city of Thessaloniki. This study focuses on the design team of Ev Zin (Ευ Ζην), an initiative of a group of students from the School of Spatial Planning and Development, Faculty of Engineering, Aristotle University of Thessaloniki, Greece. Aristotle’s University main campus occupies a large area within the city of Thessaloniki. This campus, particularly its various open spaces appear to be in a general degraded state, frequently used for delinquent activities. A group of students decided to act and to focus on the upgrade of the open green spaces of the campus, starting from a specific green space, situated at a focal point/crossroads within the campus. These students formed the Ev Zin group. This paper will be, hence, discussing the conditions that led to the degradation of the campus and the area around it, the formation of this team and its development, but more importantly the efforts of the Ev Zin group towards the upgrading of the campus, as well as the mobilization that these efforts have created, particularly concerning the principal formal stakeholders, mainly the Aristotle University’s authorities and the Attiko Metro authorities, the company constructing the underground stations at the university

General Approach for the Liquid-Phase Fragment Synthesis of Orthogonally Protected Naturally Occurring Polyamines and Applications Thereof

Orthogonally protected polyamines (PAs) have been synthesized using α,ω-diamines and ω-aminoalcohols as N-Cx-N and N-Cy synthons, respectively, and the Mitsunobu reaction as the key reaction for the assembly of the PA skeleta. The Trt, Dde, and Phth groups have been employed for protecting the primary amino functions and the Ns group for activating the primary amino functions toward alkylation and secondary amino function protection. The approach has been readily extended to accommodate the total synthesis of the spider toxins Agel 416 and HO-416b, incorporating the 3-4-3-3 and the 3-3-3-4 PA skeleton, respectively.Peer reviewe