We investigate the gender gap in Economics among bachelor's and master's graduates in Italy between 2010 and 2019. First we establish that being female exerts a negative impact on the choice to major in Economics: at the bachelor level, only 73 women graduate in Economics for every 100 men, with...

Italy was the first Western country hit by Covid-19 in February 2020, responding with a tight lockdown and full school closure until the end of the school year. This paper estimates the effect of the pandemic and school closure on the math skills of primary school pupils in Italy. We compare the...

We implement a teaching methodology aimed at improving primary school children's mathematical skills. The methodology, grounded in active and cooperative learning, focuses on peer interaction, sharing of ideas, learning from mistakes, and problem solving. We evaluate the causal effect of the...

A strukturális egyenletek módszere (SEM) népszerű többváltozós elemzési eszköz a marketingkutatások területén, mivel látens változók és a közöttük lévő kapcsolatok feltárását teszi lehetővé. A módszer két fő iránya a varianciaalapú (PLS) és a kovarianciaalapú...

Distancing policies became the primary preventive intervention during the COVID-19 pandemic. This paper estimates the effect of such interventions on the effective reproduction number (Rt) of this virus on a daily panel of 109 countries. Distancing interventions affect COVID infections...

The aim of our research is to understand and reveal the key economic, demographic, labour market, and other factors behind the common fertility trends of CEE countries in the past decades. Our main research question is what driving forces played a role in the development of the total fertility...

Social choice rules (SCRs) aggregate individual preferences to social preferences. By Arrow's (1951) impossibility theorem there does not exist a non-dictatorial SCR satisfying three desirable properties. Considering this negative axiomatic result, in this paper we determine distances of SCRs...

We examine the problem of reducing the control set in a dynamical system so that the solution set and the attainable sets remain essentially unchanged. We cite some classical results to exhibit the problem and promote a set-valued approach. A necessary condition is formulated by using a concept...

We consider transferable utility cooperative games with infinitely many players and the core understood in the space of bounded additive set functions. We show that, if a game is bounded below, then its core is non-empty if and only if the game is balanced. This finding generalizes Schmeidler...

We revise Krein's extension theory of positive symmetric operators. Our approach using factorization through an auxiliary Hilbert space has several advantages: it can be applied to non-densely defined transformations and it works in both real and complex spaces. As an application of the results...

Distancing policy interventions (DPIs) were aimed at containing the COVID-19 pandemic, but they also likely affected economic activity. This paper estimates the effects of DPIs on selected indicators of monthly economic activity, such as industrial and manufacturing production, construction...

Mathematics plays a vital role in many areas of finance and provides the theories and tools that have been widely used in all areas of finance. In this editorial, we tell authors the ideas on what types of papers we will accept for publication in the area of mathematical finance. We will discuss...

Pairwise comparison matrices are increasingly used in settings where some pairs are missing. However, there exist few inconsistency indices for similar incomplete data sets and no reasonable measure has an associated threshold. This paper generalises the famous rule of thumb for the acceptable...

With the steady growth of energy demands and resource depletion in today’s world, energy prediction models have gained more and more attention recently. Reducing energy consumption and carbon footprint are critical factors for achieving efficiency in sustainable cities. Unfortunately,...

We propose new short-step interior-point algorithms (IPAs) for solving P_* (κ)-linear complementarity problems (LCPs). In order to define the search directions we use the algebraic equivalent transformation technique (AET) of the system which characterizes the central path. A novelty of the...

In this paper, we propose a new long-step interior point method for solving sufficient linear complementarity problems. The new algorithm combines two important approaches from the literature: the main ideas of the long-step interior point algorithm introduced by Ai and Zhang, and the algebraic...

Ezen jegyzetet elektronikus jegyzetnek szánjuk. A lineáris programozási feladatok CPLEX LP kódját sok feladat esetében megadjuk. Ezek a kódok változtatás nélkül futtathatóak, megkönnyítve az eredmények reprodukálását. Ez a módszer a tanulást megkönnyíti, viszont a jegyzet...

The monostatic property of convex polyhedra (i.e., the property of having just one stable or unstable static equilibrium point) has been in the focus of research ever since Conway and Guy (1969) published the proof of the existence of the first such object, followed by the constructions of...

The unprecedented behavioural responses of societies have been evidently shaping the COVID-19 pandemic, yet it is a significant challenge to accurately monitor the continuously changing social mixing patterns in real-time. Contact matrices, usually stratified by age, summarise interaction motifs...

Fair division with unequal shares is an intensively studied resource allocation problem. For i ∈ [n], let µi be an atomless probability measure on the measurable space (C, S) and let ti be positive numbers (entitlements) with Pn i=1 ti = 1. A fair division is a partition of C into sets Si ∈...

Taking advantage of ambiguity in strategic situations is well documented in the literature. However, so far there are only few results on how to make ambiguous strategies. In this paper we introduce a procedure which makes objective ambiguity, concretely it draws an element from a set of priors,...

We introduce interior-point algorithms (IPAs) for solving P_* (κ)-horizontal linear complementarity problems over Cartesian product of symmetric cones. We generalize the primal-dual IPAs proposed recently by Illés et al. [21] to P_* (κ)-horizontal linear complementarity problems over...

A Gazdaságmodellezési Társaság kétévenként megrendezett konferenciájára 2022. június 17-én, a Budapesti Corvinus Egyetemen került sor. A konferencia fő témakörei a gazdaság-politika aktuális kérdéseihez kapcsoló kvantitatív kutatások, a Covid19 világjárványhoz...

This brief note presents a personal recollection of the early history of EUROpt, the Continuous Optimization Working Group of EURO. This historical note details the events that happened before the formation of EUROpt Working Group and the first five years of its existence. During the early years...

Az egyoldali párosítási piacok tekintetében az irodalom nagyrészt kétfős párok létrehozását vizsgálja. A gyakorlati problémáknál - mint például a vese csere programok vagy a szobatársak beosztása - ugyanakkor előfordul, hogy háromfős vagy nagyobb csoportok létrehozása a...

Minden sportbajnoksággal szemben alapvető elvárás a versenyzők megfelelő ösztönzése. A csalásbiztosságot az irodalom jellemzően bináris fogalomként kezeli, amely akadályozza az ösztönzéskompatibilitás és más kedvező tulajdonságok közötti átváltás feltárását. A cikk...

Due to its clandestine nature, quantifying the shadow economy is a challenging task. Concealing incomes leads to large negative externalities: market distortions and loss of tax revenues cause enormous damage worldwide. Countries in Central and Eastern Europe (CEE) are in a precarious situation:...

We propose a new predictor-corrector interior-point algorithm for solving Cartesian symmetric cone horizontal linear complementarity problems, which is not based on a usual barrier function. We generalize the predictor-corrector algorithm introduced in Darvay et al. (SIAM J Optim 30:2628-2658,...

In this paper we introduce a new predictor-corrector interior-point algorithm for solving P_* (κ)-linear complementarity problems. For the determination of search directions we use the algebraically equivalent transformation (AET) technique. In this method we apply the function φ(t)=t^2-t+√t...

The year 2020 saw the world turned upside down by the coronavirus pandemic. Countless human activities were suspended or cancelled as the virus spread across the globe. In this paper, we show how the regular season matches of Ecuador’s professional football league were rescheduled due to the...

The mixed-strategy equilibrium of the symmetric production-in-advance type capacity-constrained Bertrand-Edgeworth duopoly game has not been derived analytically over the entire range of intermediate capacities in the literature. Tasnádi (2020) constructed a symmetric mixed-strategy equilibrium...

Tanulmányunk célja, hogy a világ egyik legnézettebb sportrendezvényének, a labdarúgó-világbajnokságnak egy különleges hatását számszerűsítse. A labdarúgók játékjoga a hivatásos labdarúgás értékes erőforrása, amelynek értéke egy nagy tornán részt vevő játékos...