Mosbah Lafi - Academia.edu (original) (raw)

Papers by Mosbah Lafi

Technium Social Sciences Journal, 2021

Review of Economics and Finance, 2021

This work provides an opportunity to analyze the relationship between the informal economy and ec... more This work provides an opportunity to analyze the relationship between the informal economy and economic growth, the methodology used is inspired by the work of Friedrich schneider (2018). To this end, we empirically address this point using an econometric model over the period 1996-2015. From the model prediction, we find the existence of a negative causal effect of the Shadow economy on economic growth. Our results state that the simultaneous effect of the Shadow economy and the rule of law variables and regulatory quality are negative. The size of the informal sector depends positively on tax law indicators and government policies and regulations, and an increase in the size of the informal sector is detrimental to growth.

Cette these etudie les retombees technologiques vehiculees par l'investissement direct etrang... more Cette these etudie les retombees technologiques vehiculees par l'investissement direct etranger (IDE) dans les pays d'accueil. Il s'agit d'analyser les mecanismes, les obstacles et les conditions de realisation de ces externalites. L'IDE apparait comme plus important moyen a travers lequel les entreprises locales de beneficier des connaissances, des informations et des competences des firmes etrangeres. Notre analyse theorique montre dans sa premiere partie comment un pays parvient a ameliorer son attractivite en appliquant des politiques d'ouverture commeciale, d'abaissement fiscal, et de subvention des couts fixes d'implantation des FMN. Dans la deuxieme partie, nous analysons les conditions necessaires pour qu'un IDE vertical puisse etre source d'externalites technologiques. Trois principaux facteurs sont mis en exergue : le type d'implantation etrangere (horizontale ou verticale), la capacite d'absorption et les competences des ent...

Http Www Theses Fr, 2008

Cette these etudie les retombees technologiques vehiculees par l'investissement direct etrang... more Cette these etudie les retombees technologiques vehiculees par l'investissement direct etranger (IDE) dans les pays d'accueil. Il s'agit d'analyser les mecanismes, les obstacles et les conditions de realisation de ces externalites. L'IDE apparait comme plus important moyen a travers lequel les entreprises locales de beneficier des connaissances, des informations et des competences des firmes etrangeres. Notre analyse theorique montre dans sa premiere partie comment un pays parvient a ameliorer son attractivite en appliquant des politiques d'ouverture commeciale, d'abaissement fiscal, et de subvention des couts fixes d'implantation des FMN. Dans la deuxieme partie, nous analysons les conditions necessaires pour qu'un IDE vertical puisse etre source d'externalites technologiques. Trois principaux facteurs sont mis en exergue : le type d'implantation etrangere (horizontale ou verticale), la capacite d'absorption et les competences des entreprises locales, et la part du financement public des activites de R§D. Notre deuxieme analyse est empirique. Il s'agit d'une etude appliquee a l'industrie manufacturiere francaise. Nos estimations econometriques avec un panel de donnees compose de 17 710 entreprises et couvrant la periode 1998-2000, montrent la presence d'externalites de type horizontal seulement dans les secteurs de moyenne et haute technologie. L'effet d'eviction ou de captation domine les autres effets positifs dans les secteurs de faible technologie. Ces resultats confortent ceux des travaux precedents appliques sur les pays developpes.

Cet article se rattache à l'étude des différentes stratégies de multinationalisation des firmes. ... more Cet article se rattache à l'étude des différentes stratégies de multinationalisation des firmes. Les firmes multinationales dominent le paysage international et leurs activités déterminent la production mondiale, le commerce international et la recherche et développement. Les nouvelles théories de l'investissement direct étranger sont basées sur les apports de la nouvelle théorie du commerce international d'une part, et sur des éléments de la concurrence caractérisant l'industrie moderne d'autre part : économies d'échelle, stratégies oligopolistiques et différenciation des produits. Faire un inventaire de différentes approches théoriques semble être utile pour la compréhension du phénomène de la multinationalisation.

Technium Social Sciences Journal, 2021

While different streams of literature exist investigating the relationship and the conditional co... more While different streams of literature exist investigating the relationship and the conditional correlation between oil import prices, oil returns volatility and stock market returns volatility. The period of the study runs from July 1997 until July 2017 with a monthly data. The objectives of the present paper are the following to investigate the order of the mean equation, the order (p,q) of the conditional variance and the order (r,s) of the Diag-BEKK model. Data from the Indian and Indonesian stock market returns series respectively shows the existence of appropriate ARMA(2,2)-EGARCH(2,2) and ARMA(2,2)-IGARCH(2,2) models. The appropriates models of Diag-BEKK(p,q) for China, India and Indonesia are Diag-BEKK(1,2), Diag-BEKK(0,2) and Diag-BEKK(0,2) respectively. In the three Asian Countries, the three variables are correlated. Also, equations show a statistically significant covariation in oil import price, which depends more on its lags than on past errors. Consequently, oil demand are influenced by past information which is common to the crude oil market and the stock market and to its volatilities. They suggest that the comovements of the three series display an extremely volatile trend for the study period.

International Journal of Economics and Financial Issues, 2018

The question of whether foreign direct investment (FDI) contributes to the enhancement of technol... more The question of whether foreign direct investment (FDI) contributes to the enhancement of technological capacities of foreign firms operating in host countries has long captured the attention of economists and politicians. Still more intriguing is the question of determining what are the most effective methods of technology transfer. In that light, the econometric study presented here has drawn on a panel database of French firms covering the period from 2008 to 2010. Horizontal and vertical FDI spillovers are examined in upstream markets while considering their impact on the productivity of local firms. Our results show that vertical technological spillovers occur across all industry sectors whereas evidence of horizontal spillovers is revealed solely in medium- and high-tech industries. Hence, it can be said that these spillovers are inversely proportional to the technological effort exerted by domestic firms in terms of R&D expenditures. Similarly, domestic firms with an internat...

In this article, we estimate the determinants of the profit efficiency of Islamic banks using the... more In this article, we estimate the determinants of the profit efficiency of Islamic banks using the Stochastic Frontier Analysis (SFA) stochastic frontier approach. We use 37 Islamic banks in fifteen countries between 2005 and 2014. We compare efficiency between Islamic banks. In addition, we examine internal (bank-specific) and external variables that can explain sources of inefficiency and those that allow us to reduce profit efficiency scores on a specific number of variables (GDP per capita, average annual inflation rate, population density, size, capital adequacy ratio, financial profitability ratio, credit risk, operational costs). Thus, only credit risk is not a determinant of the efficiency-profit of Islamic banks.

International Journal of Economics and Financial Issues, Nov 1, 2019

The objective of this paper is to study the impact of the variability (volatility and misalignmen... more The objective of this paper is to study the impact of the variability (volatility and misalignment) of the real exchange rate (RER) on trade flows over the period 1980-2014. In order to estimate the RER misalignment, we use the methodology of Edwards (1994) which defines the equilibrium RER as a pathway of fundamental variables to ensure internal and external macroeconomic balance. The relation between equilibrium RER and its determiners is obtained by applyingan error-correction model. Results show that the volatility of the exchange rate causes a decline in exports and imports. The impact of the misalignment is significant only on imports.

International Journal of Economics and Finance

This article is intended to evaluate the level of disclosure of corporate social responsibility (... more This article is intended to evaluate the level of disclosure of corporate social responsibility (CSR) in Islamic banks and examine the relationship between the Return on Assets (ROA) and the Return on Equity (ROE) performance indices in relation to the disclosure of the Islamic banks’ corporate social responsibility. In reality, an empirical study was performed over a six-year period from 2009 to 2014, in which the CSR shows that Islamic banks are engaged in a great variety of social activities, both as private or public banks. In fact, empirical research has also found that there is a negative relationship between the corporate social responsibility of Islamic banks and the financial results of the ROA an ROE measures.

Technium Social Sciences Journal, 2021

Review of Economics and Finance, 2021

This work provides an opportunity to analyze the relationship between the informal economy and ec... more This work provides an opportunity to analyze the relationship between the informal economy and economic growth, the methodology used is inspired by the work of Friedrich schneider (2018). To this end, we empirically address this point using an econometric model over the period 1996-2015. From the model prediction, we find the existence of a negative causal effect of the Shadow economy on economic growth. Our results state that the simultaneous effect of the Shadow economy and the rule of law variables and regulatory quality are negative. The size of the informal sector depends positively on tax law indicators and government policies and regulations, and an increase in the size of the informal sector is detrimental to growth.

Cette these etudie les retombees technologiques vehiculees par l'investissement direct etrang... more Cette these etudie les retombees technologiques vehiculees par l'investissement direct etranger (IDE) dans les pays d'accueil. Il s'agit d'analyser les mecanismes, les obstacles et les conditions de realisation de ces externalites. L'IDE apparait comme plus important moyen a travers lequel les entreprises locales de beneficier des connaissances, des informations et des competences des firmes etrangeres. Notre analyse theorique montre dans sa premiere partie comment un pays parvient a ameliorer son attractivite en appliquant des politiques d'ouverture commeciale, d'abaissement fiscal, et de subvention des couts fixes d'implantation des FMN. Dans la deuxieme partie, nous analysons les conditions necessaires pour qu'un IDE vertical puisse etre source d'externalites technologiques. Trois principaux facteurs sont mis en exergue : le type d'implantation etrangere (horizontale ou verticale), la capacite d'absorption et les competences des ent...

Http Www Theses Fr, 2008

Cette these etudie les retombees technologiques vehiculees par l'investissement direct etrang... more Cette these etudie les retombees technologiques vehiculees par l'investissement direct etranger (IDE) dans les pays d'accueil. Il s'agit d'analyser les mecanismes, les obstacles et les conditions de realisation de ces externalites. L'IDE apparait comme plus important moyen a travers lequel les entreprises locales de beneficier des connaissances, des informations et des competences des firmes etrangeres. Notre analyse theorique montre dans sa premiere partie comment un pays parvient a ameliorer son attractivite en appliquant des politiques d'ouverture commeciale, d'abaissement fiscal, et de subvention des couts fixes d'implantation des FMN. Dans la deuxieme partie, nous analysons les conditions necessaires pour qu'un IDE vertical puisse etre source d'externalites technologiques. Trois principaux facteurs sont mis en exergue : le type d'implantation etrangere (horizontale ou verticale), la capacite d'absorption et les competences des entreprises locales, et la part du financement public des activites de R§D. Notre deuxieme analyse est empirique. Il s'agit d'une etude appliquee a l'industrie manufacturiere francaise. Nos estimations econometriques avec un panel de donnees compose de 17 710 entreprises et couvrant la periode 1998-2000, montrent la presence d'externalites de type horizontal seulement dans les secteurs de moyenne et haute technologie. L'effet d'eviction ou de captation domine les autres effets positifs dans les secteurs de faible technologie. Ces resultats confortent ceux des travaux precedents appliques sur les pays developpes.

Cet article se rattache à l'étude des différentes stratégies de multinationalisation des firmes. ... more Cet article se rattache à l'étude des différentes stratégies de multinationalisation des firmes. Les firmes multinationales dominent le paysage international et leurs activités déterminent la production mondiale, le commerce international et la recherche et développement. Les nouvelles théories de l'investissement direct étranger sont basées sur les apports de la nouvelle théorie du commerce international d'une part, et sur des éléments de la concurrence caractérisant l'industrie moderne d'autre part : économies d'échelle, stratégies oligopolistiques et différenciation des produits. Faire un inventaire de différentes approches théoriques semble être utile pour la compréhension du phénomène de la multinationalisation.

Technium Social Sciences Journal, 2021

While different streams of literature exist investigating the relationship and the conditional co... more While different streams of literature exist investigating the relationship and the conditional correlation between oil import prices, oil returns volatility and stock market returns volatility. The period of the study runs from July 1997 until July 2017 with a monthly data. The objectives of the present paper are the following to investigate the order of the mean equation, the order (p,q) of the conditional variance and the order (r,s) of the Diag-BEKK model. Data from the Indian and Indonesian stock market returns series respectively shows the existence of appropriate ARMA(2,2)-EGARCH(2,2) and ARMA(2,2)-IGARCH(2,2) models. The appropriates models of Diag-BEKK(p,q) for China, India and Indonesia are Diag-BEKK(1,2), Diag-BEKK(0,2) and Diag-BEKK(0,2) respectively. In the three Asian Countries, the three variables are correlated. Also, equations show a statistically significant covariation in oil import price, which depends more on its lags than on past errors. Consequently, oil demand are influenced by past information which is common to the crude oil market and the stock market and to its volatilities. They suggest that the comovements of the three series display an extremely volatile trend for the study period.

International Journal of Economics and Financial Issues, 2018

The question of whether foreign direct investment (FDI) contributes to the enhancement of technol... more The question of whether foreign direct investment (FDI) contributes to the enhancement of technological capacities of foreign firms operating in host countries has long captured the attention of economists and politicians. Still more intriguing is the question of determining what are the most effective methods of technology transfer. In that light, the econometric study presented here has drawn on a panel database of French firms covering the period from 2008 to 2010. Horizontal and vertical FDI spillovers are examined in upstream markets while considering their impact on the productivity of local firms. Our results show that vertical technological spillovers occur across all industry sectors whereas evidence of horizontal spillovers is revealed solely in medium- and high-tech industries. Hence, it can be said that these spillovers are inversely proportional to the technological effort exerted by domestic firms in terms of R&D expenditures. Similarly, domestic firms with an internat...

In this article, we estimate the determinants of the profit efficiency of Islamic banks using the... more In this article, we estimate the determinants of the profit efficiency of Islamic banks using the Stochastic Frontier Analysis (SFA) stochastic frontier approach. We use 37 Islamic banks in fifteen countries between 2005 and 2014. We compare efficiency between Islamic banks. In addition, we examine internal (bank-specific) and external variables that can explain sources of inefficiency and those that allow us to reduce profit efficiency scores on a specific number of variables (GDP per capita, average annual inflation rate, population density, size, capital adequacy ratio, financial profitability ratio, credit risk, operational costs). Thus, only credit risk is not a determinant of the efficiency-profit of Islamic banks.

International Journal of Economics and Financial Issues, Nov 1, 2019

The objective of this paper is to study the impact of the variability (volatility and misalignmen... more The objective of this paper is to study the impact of the variability (volatility and misalignment) of the real exchange rate (RER) on trade flows over the period 1980-2014. In order to estimate the RER misalignment, we use the methodology of Edwards (1994) which defines the equilibrium RER as a pathway of fundamental variables to ensure internal and external macroeconomic balance. The relation between equilibrium RER and its determiners is obtained by applyingan error-correction model. Results show that the volatility of the exchange rate causes a decline in exports and imports. The impact of the misalignment is significant only on imports.

International Journal of Economics and Finance

This article is intended to evaluate the level of disclosure of corporate social responsibility (... more This article is intended to evaluate the level of disclosure of corporate social responsibility (CSR) in Islamic banks and examine the relationship between the Return on Assets (ROA) and the Return on Equity (ROE) performance indices in relation to the disclosure of the Islamic banks’ corporate social responsibility. In reality, an empirical study was performed over a six-year period from 2009 to 2014, in which the CSR shows that Islamic banks are engaged in a great variety of social activities, both as private or public banks. In fact, empirical research has also found that there is a negative relationship between the corporate social responsibility of Islamic banks and the financial results of the ROA an ROE measures.