Response Surface Estimates of the Cross-Sectionally Augmented IPS Tests for Panel Unit Roots

2011 ◽  
Vol 41 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Jesús Otero ◽  
Jeremy Smith
2012 ◽  
Vol 32 (2) ◽  
pp. 183-203 ◽  
Author(s):  
Christoph Hanck

2021 ◽  
pp. 097215092199305
Author(s):  
Kuldeep Kumar Lohani

The present article attempts to analyse trade and per capita income convergence for the BRICS countries. The effects of economic bloc formation on their trade and income distribution or convergence (divergence) among the countries have been analysed. To observe the effect of trade on convergence rates, intra-trade group, single difference approach and panel unit roots tests have been used. The convergence measure is estimated between BRICS countries and their major trading partners from post-trade liberalization period. The study revealed that BRICS countries converged over the study period. However, the evidence on post-BRICS economic bloc formation shows an insignificant relationship. The results of the analysis of post-trade liberalization of BRICS countries vary among the BRICS countries. Further, panel unit roots test results confirm that conditional convergence is taking place within BRICS bloc and all export-based groups except for Indian economy and import-based groups. Besides, absolute convergence has been confirmed for all the groups. Thus, the study suggests the need of BRICS countries to actively engage in trade and investment activities.


Author(s):  
Sandip B Bankar ◽  
Mahesh V Bule ◽  
Rekha S Singhal ◽  
Laxmi A Ananthanarayan

Co-immobilization of glucose oxidase (EC 1.1.3.4) and catalase (EC 1. 11.1.6) on non-porus glass surfaces using ?-aminopropyltriethoxysilane and polyethyleneimine as an activator and gluteraldehyde as cross linking agent has been carried out for its potential use. Polyethyleneimine was found to be a superior immobilization activator than ?-aminopropyltriethoxysilane. In present study, the effects of rough and smooth beads and optimization of the ratio of enzyme concentrations, activator material and concentration of the cross linking agent were investigated using response surface technology. With optimized concentration of glucose oxidase to catalase ratio (0.97), polyethyleneimine (150 mg/l) and gluteraldehyde (15 ml), the effect of glass bead concentration for maximum immobilization yield was investigated. Central composite optimization strategy with 16 experiments increased immobilization yield from 82.63% to 92.74%. It was observed that 0.3 ml of beads per 120 U of glucose oxidase were necessary for higher immobilization yield.


2013 ◽  
Vol 45 (29) ◽  
pp. 4152-4159
Author(s):  
Kristofer Månsson ◽  
Ghazi Shukur ◽  
Pär Sjölander

Sign in / Sign up

Export Citation Format

Share Document