Academic literature on the topic 'General Methods of Moments (GMM)'

Les travaux de cette thèse s'inscrivent dans le contexte des systèmes de particules. Nous considérons différents systèmes physiques, décrits de manière continue, et dont la dynamique est modélisée par des équations aux dérivées partielles décrivant l'évolution temporelle de certaines quantités macroscopiques ou microscopiques, selon l'échelle de description envisagée. Dans une première partie, nous nous intéressons à une équation de type coagulation-fragmentation cinétique. Nous obtenons un résultat d'existence globale en temps, dans le cadre des solutions renormalisées de DiPerna-Lions, pour toute donnée initiale vérifiant les estimations naturelles et possédant une norme L1 et une norme Lp (p > 1) finies. La deuxième partie traite de méthodes de moments. L'objectif de ces méthodes est d'approcher un modèle cinétique par un nombre fini d'équations portant sur des quantités dépendant uniquement de la variable d'espace, et la question est de savoir comment fermer le système obtenu pour obtenir une bonne approximation de la solution du modèle cinétique. Dans un cadre linéaire, nous obtenons une méthode de fermeture explicite conduisant à un résultat de convergence rapide. Enfin, dans une troisième partie, nous travaillons sur la modélisation du trafic routier avec prise en compte de la congestion à l'aide d'un système hyperbolique avec contraintes, issu de la dynamique des gaz sans pression. En modifiant convenablement ce système, nous parvenons à modéliser des phénomènes de trafic routier "multi-voies", comme l'accélération, et la création de zones de vide. Un résultat d'existence et de stabilité des solutions de ce modèle modifié est démontré.

Abstracts in English, Xhosa and Southern Sotho<br>This study critically explores the link between internationalisation theories and outward foreign direct investment (FDI) – a linkage which is well documented in the literature. Numerous studies have established that the internationalisation process recognises both firm- and market-specific aspects, which greatly determine the direction of outward FDI in terms of volume and pattern. In this interaction, path dependency is determined by the intensity of overlapping aspects or linkages, from firm-level heterogeneity and host market aspects that direct investment patterns in terms of the latter, to the volumes of firm-level adjustments. Firm-level heterogeneity comprises those traits, which enable an individual firm to make an investment decision, select a market-entry strategy and create the competitive advantages that will sustain its investments. Macro-level or country-specific aspects encompass those traits or characteristics of host markets, which encourage FDI on the part of multinational enterprises (MNEs). Most studies overlook the path dependency of country- and firm-specific aspects, which are crucial to the internationalisation processes of international business, economics and trade. Academic studies either focus on macro- or micro-level aspects, without paying specific attention to the path dependency of expansion strategies. The present study attempts to fill these gaps in the existing body of knowledge, by investigating international business in these contexts. The rationale for undertaking this study was two-fold: first, FDI holds proven benefits for host markets, which include economic growth, industry spillover, human capital development and transitory tacit knowledge. From a firm-level perspective, outward FDI largely enhances the capacity of MNEs, prompting an increase in asset accumulation, market share and human capital development, the more efficient utilisation of resources and return on equity. In this study, an argument is presented for measuring the variables of both firm- and market-specific aspects, since most existing studies in this genre focus either on micro- or macro-level determinants, or totally overlook the importance of linkages. Second, no documented research has investigated the path dependency of expansion strategies, especially in Africa. Crucially, the importance of path dependency of South Africa’s outward investment has not been documented either. Further, existing evidence on the role the path dependency of expansion strategies plays in outward FDI are scarce, with even fewer studies following a sectorial approach. This study attempts to fill these academic research gaps by reflecting both firm- and market-level data from various sources for the period 1995–2015, using panel dynamic regression models. The study found that the linkages between firm heterogeneity (firm-level evidence) and market-level aspects create a path dependency of expansion strategies. MNEs adopt either joint ventures or wholly owned subsidiaries (or both) as market-entry strategies, but the decision is informed by the intensity of those firm heterogeneity aspects that allow them to exploit opportunities and mitigate risk in host markets. Notably, the intensity of path dependency seemingly varies from one industrial segment to the next. The impulse response approach delivered evidence that one standard deviation shock of firm-specific variables led to a moderate improvement in firm-level capacities in the short run, but a significant improvement in the long run. The same result was recorded for market-level aspects, with the intensity of the results varying from one industry to the next. The causality test attempted to explore the causal relationship between the study variables in both firm- and market-level aspects. Empirical evidence from the study indicates that the size of the firm and its capacity to utilise its resources efficiently, influence their investment in host markets. As regards market-specific aspects, the size of the economy, levels of industry and trade openness were found to have a causal effect on the inflow of FDI in host markets. The intensity of causal aspects was also found to vary from one industry to the next, due to variations in firm-level heterogeneity and their linkage in terms of aspects related to the host market. In sum, this study complements existing material on the subject of international business.<br>Olu phononongo luphicotha ikhonkco phakathi kweengcingane zamazwe ngamazwe kunye notyalo-mali ngokuthe ngqo oluphuma ngaphandle kumazwe asemzini (i-FDI) –indibaniselo ebhalwe kakuhle kwimiqulu yoncwadi. Izifundo ezininzi ezenziweyo ziye zaqinisekisa ukuba inkqubo yamazwe ngamazwe iyazamkela zombini inkampani- kunye nemiba ekhethekileyo yemarike, ezihlola kakhulukazi imikhombandlela (izikhokelo) ye-FDI yangaphandle ngokomthamo kunye nephatheni. Kule ntsebenziswano, indlela yokuxhomekeka ifunyanwa ngobungakanani bezinto ezisebenzelelanayo/ezingenanayo okanye izenzo zokuhlangana, ukusuka kwiintlobo-ntlobo zamanqanaba enkampani kunye neemfuno zabasingathe imicimbi yeendawo zokuthengisa (iimarike) iimpahla ezilawula iiphatheni zotyalo-imali ngokweyokugqibela, kwimilinganiselo yokulungelelaniswa kwenqanaba lwenkampani. Iintlobo-ntlobo zamanqanaba enkampani ziquka ezo mpawu, ezenza inkampani nganye yenze isigqibo sotyalo-mali, ikhethe isicwangciso sokungeniswa kwimarike kwaye siyile amathuba amahle okhuphiswano aya kugcina utyalo-mali. Inqanaba eliphezulu okanye iinkalo ezithile zelizwe zibandakanya ezo zimo okanye iimpawu zeemarike ezamkelekileyo, ezikhuthaza i-FDI kwiinkampani zamazwe ngamazwe (i-MNEs). Uninzi lwezifundo aziyiniki ngqalelo indlela yokuxhomekeka yelizwe kwimicimbi ekhethekileyo nebalulekileyo yenkampani kwiinkqubo zangokwamazwe oshishino lwamazwe ngamazwe, uqoqosho norhwebo. Uphando lwemfundo ephakamileyo lugxininisa kwiinkcukacha ezikwinqanaba eliphezulu okanye eliphantsi ngokunganiki ngqalelo kwindlela yokuxhomekeka yeendlela zokwandisa. Uphononongo lwangoku luzama ukuvala izikhewu/izikroba kulwazi olukhoyo., ngokuphanda ishishini lwamazwe ngamazwe kule meko. Ingqiqo ekwenzeni olu phando yahlulwe kubini: okokuqala, i-FDI inenzuzo eqinisekisiweyo kwabasingethe iimarike, ezibandakanya ukukhula koqoqosho, ukuchuma kwamashishini, ukuphuhliswa kwezakhono zabantu kunye nolwazi oludlulileyo lwezakhono. Ngakwicala lenqanaba lenkampani, i-FDI yangaphandle iphakamisa amandla e-MNE, ikhawulezisa ukunyusa uqokelelo lwempahla, isabelo semarike kunye nophuhliso lwabantu, ukusetyenziswa ngokufanelekileyo kwezixhobo kunye nokubuyela kubulungisa bokulingana. Kolu phononongo, impikiswano inikezelwe ukulinganisa iinguqu zombini yenkampani- kunye nemimiselo ethile yemarike, njengoko olunye uphando oluninzi olwenziweyo kolu hlobo lugxininisa koonobangela abakwizinga elisezantsi okanye eliphezulu, okanye kunganikwa ngqalelo tu kukubaluleka kwezenzo zokudibana / zokunxibelelana. Okwesibini, akukho phando lubhaliweyo oluphande indlela yokuxhomekeka kweendlela zokwandisa, ngakumbi e-Afrika. Ngokusesikweni, ukubaluleka kwendlela yokuxhomekeka yotyalo-mali lwangaphandle eMzantsi Afrika alukaze nalo lubhalwe phantsi. Ukongezelela, ubungqina obukhoyo kwindima yendlela yokuxhomekeka yeendlela zokwandisa kwi-FDI yangaphandle zinqabile, kwakunye nezifundo ezimbalwa ezilandela indlela yamacandelo. Olu phononongo luzama ukuzalisa izikroba zophando zemfundo ephakamileyo ngokuzibonakalisa zombini inkampani- kunye nedatha yamanqanaba emarike avela kwimithombo eyahlukeneyo yexesha lowe-1995-2015, usebenzisa iimodeli zepaneli ezinamandla zokubuy’umva. Uphononongo lufumanise ukuba ukudibana phakathi kweentlobo-ntlobo zenkampani (ubungqina bezinga lenkampani) kunye nemilinganiselo yezinga lemarike zidala indlela yoxhomekeko yeendlela zokukhula. Ii-MNE zamkela intsebenziswano ngokuhlangeneyo okanye bazibambele ngokwabo ngokupheleleyo (okanye zombini) njengeendlela zokungena kwimarike, kodwa isigqibo siphenjelelwa bubungakanani beentlobo-ntlobo zemicimbi yenkampani evumela ukuba baxhaphaze amathuba kwaye banciphise umngcipheko kwiimarike zenkampani. Ngokuphawulekayo, ubukhulu bokuxhomekeka wendlela yokuxhomekeka kukhangeleka kusahluka ukusuka kwicandelo elinye lozoshishino ukuya kwelinye elilandelayo. Indlela yokuphendula ngokungxama inikezele ubungqina bokuba ukuphazamiseka okusesikweni kwizinto eziguquguqukayo zenkampani ezikhethekileyo zikhokelele ekuphuculeni okusezingeni eliphakathi kwinqanaba kubungakanani benqanaba lenkampani ngexeshana, kodwa ukuphuculwa okubonakalayo nokubalulekileyo ekuhambeni kwexesha. Isiphumo esifanayo sabhalwa phantsi kwiinkalo zemarike, nobukhulu beziphumo zohluka ukusuka kwelinye ishishini ukuya kwelinye. Uvavanyo lwamaxesha athile luzame ukuphonononga ubudlelwane bamaxesha athile phakathi kwezifundo zezinto eziguquguqukayo kwiinkalo zombini inkampani –kunye nenqanaba lemarike/ neemeko zemarike. Ubungqina bamava obuvela kuphando lubonisa ukuba ubungakanani benkampani kunye namandla okusebenzisa uvimba wezixhobo ngokufanelekileyo, ziphembelela utyalo-mali kwiimarike zenkampani. Ngokubhekiselele kwimimandla ethile yemarike, ubungakanani boqoqosho, amazinga oshishino kunye nokuvuleka kwezorhwebo kufunyaniswe ukuba kunefuthe elenzekayo ngamaxesha athile ekungeneni kwe-FDI kubasingathi beemarike. Ubungakanani bemicimbi eyenzeka ngamaxesha athile yafunyanwa kwakhona ukuba yohlukile ukusuka kwelinye ishishini ukuya kwelinye, ngenxa yeenguqu kwiintlobo-ntlobo zeamanqanaba enkampani kunye nokudibana kwabo ngokwemiba enxulumene nabasingethe imarike. Kafutshane esi sifundo, sigcwalisa izixhobo ezikhoyo kwisihloko sezoshishino lamazwe ngamazwe.<br>Dinyakišišo tše di utolla ka tsinkelo kgokagano gareng ga diteori tša peyomaemong a boditšhabatšhaba le peeletšothwii ye e tšwago dinageng tša ka ntle (FDI) – e lego kgokagano yeo go ngwadilwego ka yona kudu ka dingwalweng. Dinyakišišo tše mmalwa di utollotše gore tshepedišo ya go bea maemong a boditšhabatšhaba e lemoga bobedi dilo tša difeme le tše di amanago le difeme, tšeo di laolago kudu fao FDI ya dinaga tša ka ntle e lebilego gona mabapi le bontši le mokgwa. Ka tirišanong ye, go tšea diphetho go ya ka maemo go laolwa ke bontši bja dilo tšeo di dirwago ka nako e tee goba dikamano, go tloga go go farologanya ditšweletšwa ka femeng le dilo tša mmaraka wa ka nageng tšeo di laolago mekgwa ya dipeeletšo mabapi le go ya ka mmaraka wa ka nageng, go ya go mehuta ye mentši ya dipeakanyo tša ka femeng. Go farologanya ditšweletšwa ka femeng go bopilwe ke diphetogo tše, tšeo di kgontšhago feme ye itšego go tšea sephetho sa mabapi le peeletšo, go kgetha maano a go tsena ka mmarakeng le go hlama menyetla ye mekaone yeo e tlago tšwetša pele peeletšo ya yona. Dikokwane tša ekonomi ye kgolo goba tša ka nageng di akaretša diphetogo tšeo goba dipharologantšhi tša mebaraka ya ka nageng, tšeo di hlohleletšago FDI ka karolong ya dikgwebo tša dinaga tša ka ntle (di-MNE). Dinyakišišo tše ntši di hlokomologile go tšea diphetho go ya ka maemo ga naga le ga dilo tša ka femeng ye itšego, tšeo di lego bohlokwa go tshepedišo ya peyomaemong a boditšhabatšhaba ya dikgwebo tša boditšhabatšhaba, diekonomi le kgwebišano. Dinyakišišo tša dirutegi di ka be di lebeletše kudu dilo tša ekonomi ye kgolo goba tša ye nnyane, ka ntle le go lebiša šedi ye kgolo go go tšea diphetho go ya ka maemo a boditšhabatšhaba ga maano a katološo. Dinyakišišo tše di leka go tlatša dikgoba tše ka tsebo ye e lego gona, ka go nyakišiša dikgwebo tša boditšhabatšhaba ka maemong a. Maikemišetšo a go dira dinyakišišo tše e bile a mabedi: sa mathomo, FDI e na le dikholego tšeo di tiišeditšwego go mebaraka ya ka dinageng, tšeo di akaretšago kgolo ya ekonomi, khuetšano ya diintasteri, tlhabollo ya bokgoni bja bašomi le phetišetšo ya tsebo ye e lego nyanyeng. Go ya ka maemong a difeme, FDI ye e tšwago dinageng tša ka ntle e godiša bokgoni bja di- MNE, ya hlohleletša koketšego ya khwetšo ya dithoto, ya kabelano ya mmaraka le ya tlhabollo ya bokgoni bja bašomi, tšhomišo ye kaone kudu ya methopo le go hwetša poelo go dikabelano. Ka mo dinyakišišong tše, go hlagišwa ntlha ya go ela diphapano tša bobedi dilo tša ka femeng le tša ka mmarakeng, ka ge bontši bja dinyakišišo tše di lego gona ka mo lekaleng le la dinyakišišo di lebeletše kudu tšeo di laolago ekonomi ye nnyane goba ye kgolo goba tšeo di hlokomologago ka botlalo bohlokwa bja dikgokagano. Sa bobedi, ga go dinyakišišo tšeo di ngwadilwego tšeo di nyakišišitšego go tšea diphetho go ya ka maemo ga maano a katološo, kudukudu ka Afrika. Se bohlokwa ke gore, bohlokwa bja go tšea diphetho go ya ka maemo ga peeletšo ya Afrika Borwa ya dinaga tša ka ntle ga se gwa ngwalwa le ge go le bjale. Godimo ga fao, bohlatse bjo bo lego gona ka ga mošomo wa go tšea diphetho go ya ka maemo fao go ralokago ka ga maano a katološo ka go FDI ya dinaga tša ka ntle e se bjo bontši, gomme go na le dinyakišišo tše mmalwa go latela mokgwa wo o lebeletšego makala. Dinyakišišo tše di leka go tlatša dikgoba tše tša dinyakišišo tša dirutegi ka go laetša tshedimošo ya bobedi ka maemong a difeme le ka mebarakeng go tšwa methopong ya mehutahuta go tloga ka mengwaga ya 1995–2015, ka go šomiša mekgwa ya kakanyo ya dikamano ye e fetogago. Dinyakišišo di hweditše gore dikamano gareng ga go farologanya ditšweletšwa (bohlatse bja ka maemong a difeme) le dilo tša maemo a ka mmarakeng di hlola go tšea diphetho go ya ka maemo ga maano a katološo. Di-MNE di šomiša masolo a mohlakanelwa goba dikhamphani tša ka fasana tšeo di laolwago ka botlalo (goba ka bobedi) bjalo ka maano a go tsena ka mmarakeng, eupša sephetho se laolwa ke bontši bja dilo tšeo tša go farologanya ditšweletšwa tšeo di di dumelelago go nyaka dibaka le go fokotša kotsi ka mebarakeng ya ka nageng. Seo se lemogilwego ke gore, bontši bja go tšea diphetho go ya ka maemo go bonala go fapane go ya ka karolo ya intasteri go ya go ye nngwe. Mokgwa wa go arabela kgoketšo wo o hlagišitšwego ka bohlatseng bja gore phapogo ya tlwaelo ya diphapano tša ka femeng e feleleditše ka kaonafalo ya magareng ya bokgoni bja difeme lebakeng le lekopana, eupša ka kaonafalo ye kgolo mo lebakeng le letelele. Dipoelo tše di swanago di begilwe ka go dilo tša maemo a ka mmarakeng, gomme bontši bja dipoelo tša fapana go ya ka diintasteri. Teko ya mathata yeo e bego e leka go utolla kamano ya tšeo di bakago se gareng ga phapano ya dinyakišišo ka go bobedi ka dilo tša ka femeng le tša ka mmarakeng. Bohlatse bja maitemogelo go tšwa ka mo dinyakišišong bo laetša gore bogolo bja feme le bokgoni bja yona bja go šomiša methopo ya yona gabotse ntle le mathata, di huetša peeletšo ya yona ka mebarakeng ya ka nageng. Mabapi le dilo tša ka mmarakeng, bogolo bja ekonomi, maemo a intasteri le go hloka sephiri ka kgwebišanong di bonwe di na le seabe sa go baka seemo go tseneng ga FDI ka mebarakeng ya ka nageng. Bontši bja dilo tše di bakago maemo go hweditšwe gape gore go fapana go ya ka diintasteri, ka lebaka la diphapano ka go farologanyo ya ditšweletšwa ka difemeng le kamano ya tšona mabapi le dilo tšeo di amanago le mmaraka wa ka nageng. Bjalo ka kakaretšo, dinyakišišo tše di tlaleletša dingwalwa tšeo di lego gona ka ga hlogotaba ya dikgwebo tša boditšhabatšhaba.<br>Business Management<br>D. Phil. (Business Management)