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RISS 인기검색어
- 검색키워드
- 저자 : ( Luca Antonio Ricci ) (검색결과 3 건)
- 무료
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A Ricardian Model of New Trade and Location Theory
( Luca Antonio Ricci ) 세종대학교 경제통합연구소 (구 세종대학교 국제경제연구소) 1997 Journal of Economic Integration Vol.12 No.1
This paper provides a new model of firm`s location choices. It integrates a Ricardian model of comparative advantage with the location effects deriving from trade costs, increasing returns to scale, product dif ferentiation, and monopolistic competition. In a two-region, two-differentiated-good, one-factor framework, the regional degree of specialization depends positively on the extent of the comparative advantage in productivity and on the degree of returns to scale; it depends negatively on the magnitude of the trade costs. Hence, the model accommodates high levels of intra-industry trade among countries with similar level of development, as well as high levels of inter-industry trade among countries with different technologies. (JEL Classification: F11, F12, F15, L13, R12)
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A Ricardian Model of New Trade and Location Theory
Ricci, Luca Antonio 세종대학교 국제경제연구소 1997 Journal of Economic Integration Vol.12 No.1
This paper provides a new model of firm's location choices. It integrates a Ricardian model of comparative advantage with the location effects deriving from trade costs, increasing returns to scale, product differentiation, and monopolistic competition. In a two-region, two-differentiated-good, one-factor framework, the regional degree of specialization depends positively on the extent of the comparative advantage in productivity and on the degree of returns to scale; it depends negatively on the magnitude of the trade costs. Hence, the model accommodates high levels of intra-industry trade among countries with similar level of development, as well as high levels of inter-industry trade among countries with different technologies. (JEL Classification: F11, F12, F15, L13, R12)
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Alcalde, Murilo Priori,Vivan, Rodrigo Ricci,Marciano, Marina Angelica,Duque, Jussaro Alves,Fernandes, Samuel Lucas,Rosseto, Mariana Bailo,Duarte, Marco Antonio Hungaro The Korean Academy of Conservative Dentistry 2018 Restorative Dentistry & Endodontics Vol.43 No.2
Objectives: This study evaluated the effect of ultrasonic agitation of mineral trioxide aggregate (MTA), calcium silicate-based cement (CSC), and Sealer 26 (S26) on adaptation at the cement/dentin interface and push-out bond strength. Materials and Methods: Sixty maxillary canines were divided into 6 groups (n = 10): MTA, S26, and CSC, with or without ultrasonic activation (US). After obturation, the apical portions of the teeth were sectioned, and retrograde cavities were prepared and filled with cement by hand condensation. In the US groups, the cement was activated for 60 seconds: 30 seconds in the mesio-distal direction and 30 seconds in the buccal-lingual direction, using a mini Irrisonic insert coupled with the ultrasound transducer. After the materials set, 1.5-mm thick sections were obtained from the apexes. The presence of gaps and the bond between cement and dentin were analyzed using low-vacuum scanning electron microscopy. Push-out bond strength was measured using a universal testing machine. Results: Ultrasonic agitation increased the interfacial adaptation of the cements. The S26 US group showed a higher adaptation value than MTA (p < 0.05). US improved the push-out bond strength for all the cements (p < 0.05). Conclusions: The US of retrograde filling cements enhanced the bond to the dentin wall of the root-end filling materials tested.
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