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...

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...

We investigate the gender gap in Economics among bachelor's and master's grad- uates 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,...

In this paper we propose a new predictor-corrector interior-point algorithm for solving P_* (κ) horizontal linear complementarity problems defined on a Cartesian product of symmetric cones, which is not based on a usual barrier function. We generalize the predictor-corrector algorithm...

Finding the most suitable co-author is one of the most important ways to conduct effective research in scientific fields. Data science has contributed to achieving this possibility significantly. The present study aims at designing a mathematical model of co-author recommender system in...

We introduce a new predictor-corrector interior-point algorithm for solving P_*(κ)-linear complementarity problems which works in a wide neighbourhood of the central path. We use the technique of algebraic equivalent transformation of the centering equations of the central path system. In this...

In this paper, we investigate a new primal-dual long-step interior point algorithm for linear optimization. Based on the step-size, interior point algorithms can be divided into two main groups, short-step and long-step methods. In practice, long-step variants perform better, but usually, a...

Pairwise comparisons have become popular in the theory and practice of preference modelling and quantification. In case of incomplete data, the arrangements of known comparisons are crucial for the quality of results. We focus on decision problems where the set of pairwise comparisons can be...

In a liability problem, the asset value of an insolvent firm must be distributed among the creditors and the firm itself, when the firm has some freedom in negotiating with the creditors. We model the negotiations using cooperative game theory and analyze the Shapley value to resolve such...

Efficient solution of linear systems of equations is one of the central topics of numerical computation. Linear systems with complex coefficients arise from various physics and quantum chemistry problems. In this paper, we propose a novel ABS-based algorithm, which is able to solve complex...

Formal concept analysis (FCA) is a mathematical theory that is typically used as a knowledge representation method. The approach starts with an input binary relation specifying a set of objects and attributes, finds the natural groupings (formal concepts) described in the data, and then...

There is increasing attention to the sustainability and fairness of the pay-as-you-go pension system as a consequence of the aging society and the imbalance between the old and the young generation’s number. In this system, the pension depends only on the previous contribution, which...

We investigate the gender gap in Economics among bachelor's and master's grad- uates 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,...

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...

This paper analyzes the link between the subject choices of German students in upper secondary school and teacher gender when these choices are taken. Our results corroborate the hypothesis that teacher gender matters in this regard, and they indicate that girls respond more strongly than boys...

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...

Using different production function models, we study the causal association between adolescence development and the increase in the gap in math performance between boys and girls. We use data from the 1958 British National Child Development Study, a longitudinal survey of all British children...

We propose simple mathematical models for the legal concept ofbalancing of interests, to resolve the conflict between the rights toprivacy and to the protection of personal data in Art. 7 and Art. 8 ofthe EU Charter of Fundamental Rights (EUCh) against the right ofaccess to information derived...

General equilibrium models are typically presented with mathematical methods, such as the Edgeworth Box, that do not easily generalize to more than two goods and more than two agents. This is fine as a conceptual introduction, but it may be insufficient in the "Big Data−Machine...

Students in East-Asian countries consistently score in the top in international assessments. One possible explanation for this success is their use of 'Lesson study' to enhance teaching practices, but evidence on its effectiveness is still scant. We evaluate a national teacher development...

Can high-dosage tutoring help low-performing adolescents? We implement a randomized experiment to test a twofold intervention: A teacher training program customized for instructing 8th graders who perform poorly in mathematics and two 4-6 week periods of targeted math instruction for...

Can high-dosage tutoring help low-performing adolescents? We implement a randomized experiment to test a twofold intervention: A teacher training program customized for instructing 8th graders who perform poorly in mathematics and two 4-6 week periods of targeted math instruction for...

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...

This paper presents unprecedented exchange rate forecasting results based upon a new model which approximates the gap between the fundamental equilibrium exchange rate and the actual exchange rate with the long-maturity forward exchange rate. The theoretical derivation of our forecasting...

Shape analysis has special importance in the detection of manipulated redistricting, which is called gerrymandering. In most of the US states, this process is made by non-independent actors and often causes debates about partisan manipulation. The somewhat ambiguous concept of compactness is a...

We propose a new predictor-corrector (PC) interior-point algorithm (IPA) for solving linear complementarity problem (LCP) with P_* (κ)-matrices. The introduced IPA uses a new type of algebraic equivalent transformation (AET) on the centering equations of the system defining the central path....

The nucleolus offers a desirable payoff-sharing solution in cooperative games, thanks to its attractive properties-it always exists and lies in the core (if the core is nonempty), and it is unique. The nucleolus is considered as the most `stable' solution in the sense that it lexicographically...

This paper deals with the design problem of H∞ control for linear systems in finite-frequency (FF) domain. Accordingly, the H∞ norm from the exogenous disturbance to the controlled output is reduced in a given frequency range with utilizing the generalized Kalman–Yakubovic–Popov (gKYP)...

A dolgozat a közgazdasági modellezés matematikai hátterének problémáit vizsgálja. A modellezés legfőbb problémája, hogy a vizsgált jelenségek nem emelhetők ki a környezetükből, és nem lehet egyszerűsített modellel a gazdasági jelenségeket leírni, következésképpen a...

A jelen cikk a folyóirat előző számában megjelent Bélyácz–Daubner (2020) tanulmányra reflektál, amely azt vizsgálta, maradt-e máig tartó hatása Keynes gondolatainak, hogy miként is kell értelmezni a valószínűség fogalmát az üzleti életben és a közgazdasági életben. Az...

Cikkünkben áttekintjük a pontatlan valószínűség (ambiguity) fogalmát. Egy motiváló, jól ismert példától, az Ellsberg-paradoxontól (Ellsberg, 1961) indulunk, és két alapmodellt (Schmeidler, 1989 ésGilboa és Schmeidler, 1989) ismertetünk. Egy rövid fejezetben az alkalmazások...

Már az általános egyensúlyi modellek első, statikus, illetve a hosszú távú egyensúly feltételeit megfogalmazó változataiban is felmerült a ,,makroökonómiai lezárás", és ezen belül különösen a beruházások meghatározásának problémája. De a beruházások beruházó...

Bónusz-málusz rendszerek kockázatkezelési módszerek, amelyek leggyakoribb előfordulása a kötelező gépjármű-felelősségbiztosítás esetén figyelhető meg. Bónusz-málusz rendszerek kalibrációja jellemzően abban merül ki, hogy egy adott átsorolási szabályt feltételezve...

A cikk egy visszavásárlásos rendszerben jelentkező készletallokációs problémát elemez. A vizsgálat középpontjában egy könyvkiadó áll, mely több csatornán keresztül értékesíti könyveit. A termék iránti kereslet nem ismert, de korábbi iparági tapasztalatok alapján...

Alapvetően befolyásolja egy sportág népszerűségét, hogy milyen versenyformátumot használ. Egy versenyformátum hatékonysága alatt azt értjük, hogy milyen jól tudja visszaadni a versenyben részt vevő játékosok vagy csapatok valós, ámde rejtett erősorrendjét. Cikkünkben...

Fairness has several interpretations in sports, one of them being that the rules should guarantee incentive compatibility, namely, a team cannot beworse off due to better results in any feasible scenario. The current seeding regime of the most prestigious annual European club football...