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on Computational Economics |
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Issue of 2009‒05‒02
four papers chosen by |
| By: | Crescenzio Gallo |
| Abstract: | Technological development and explosion of computing tools allow today to make best use of modeling methodologies that in the past were not able to perform the calculations necessary for the mathematical representation of a complex system. This paper illustrates some directions in literature about the modeling of Dynamical Systems, targeting the algorithmic search of numerical methods with an exact or limited error approximation. |
| Keywords: | modeling; dynamical systems; algorithm. |
| Date: | 2009–02 |
| URL: | http://d.repec.org/n?u=RePEc:ufg:qdsems:01-2009&r=cmp |
| By: | Emini, Christian Arnault; Kanmi Feunou, Dorine |
| Abstract: | This paper aims at bringing out the determinants of the significant poverty alleviation observed in Cameroon between 1993 and 2001. It focuses on the decomposition of poverty and growth changes, in order to assess the intrinsic contribution of each major economic policy implemented in Cameroon during this period. A double calibration technique, within a micro-simulated computable general equilibrium model was used to that effect. Findings obtained reveal that the devaluation, the rehabilitation of infrastructures, and the VAT enforcement respectively contributed for two percent, 9 percent and -4 percent in the poverty alleviation; for one percent, 11 percent, and three percent in explaining GDP growth; and for 65 percent, zero percent and 11 percent in the rise of the consumer price index (CPI). Beside revealing the intrinsic impacts of aforementioned policies, the double calibration approach made it possible to realize that technological changes arose between 1993 and 2001 alone stand to explain up to 31 percent of the nationwide decline in poverty, 45 percent of the GDP growth, and 4 percent of the CPI increase. The notion of technological changes refers here to changes occurred across the time in the values of scale parameters contained in production and product differentiation functions. |
| Keywords: | Double calibration; Impacts decomposition; Micro simulation; Devaluation; CGE models; Technological changes; Tax and Customs reforms; Basic infrastructure. |
| JEL: | H54 C68 H22 D58 I32 |
| Date: | 2008–11 |
| URL: | http://d.repec.org/n?u=RePEc:pra:mprapa:14820&r=cmp |
| By: | E. Agliardi; M.L. Guerra; L. Stefanini |
| Date: | 2008–09 |
| URL: | http://d.repec.org/n?u=RePEc:bol:bodewp:643&r=cmp |
| By: | Sven Banisch, Tanya Araujo and Jorge Louçã |
| Abstract: | This paper examines the interplay of opinion exchange dynamics and communication network formation. An opinion formation procedure is introduced which is based on an abstract representation of opinions as k-dimensional bitstrings. Individuals interact if the difference in the opinion strings is below a defined similarity threshold dI. Depending on dI, different behaviour of the population is observed: low values result in a state of highly fragmented opinions and higher values yield consensus. The first contribution of this research is to identify the values of parameters dI and k, such that the transition between fragmented opinions and homogeneity takes place. Then, we look at this transition from two perspectives: first by studying the group size distribution and second by analysing the communication network that is formed by the interactions that take place during the simulation. The emerging networks are classified by statistical means and we find that non-trivial social structures emerge from simple rules for individual communication. |
| Date: | 2009–03 |
| URL: | http://d.repec.org/n?u=RePEc:ise:isegwp:wp162009&r=cmp |