Government Debt, Taxes and Growth

2000 ◽  
Vol 18 (2) ◽  
pp. 119-130
Author(s):  
Riccardo Fiorito
Keyword(s):  
Standard Model ◽  
Discrete Time ◽  
Government Debt ◽  
Tax Rates ◽  
Time Model ◽  
Discrete Time Model ◽  
Distortionary Taxation ◽  
The Standard Model ◽  
The Government ◽  
The Impact

Abstract By using a small discrete-time model we evaluate the impact of distortionary taxation on the government debt-to-GDP ratio. Once the standard model is modified accordingly, it appears that the increase of taxation has a growth cost which increases as long as die debt-to-GDP ratio rises. The empirical implementation uses data drawn from recent Italy’s record and is based on realistic shocks to the relevant parameters. A major finding is the importance of the debt level - not only of the dynamics - to stabilize the debt-to-GDP ratio. A second finding is that sustainable tax rates are remarkably lower than those prevailing in Italy since the 80s.

Impact of Dispersion on Dynamics of a Discrete Metapopulation Model

2007 ◽  
Vol 14 (04) ◽  
pp. 379-396 ◽  
Author(s):  
Yu Huang ◽  
Xingfu Zou
Keyword(s):  
Periodic Orbit ◽  
Discrete Time ◽  
Positive Equilibrium ◽  
Global Dynamics ◽  
Metapopulation Model ◽  
Time Model ◽  
Discrete Time Model ◽  
Global Extinction ◽  
Dispersion Terms ◽  
The Impact

We propose and analyze a discrete time model for metapopulation on two patches with local logistic dynamics. The model carries a delay in the dispersion terms, and our results on this model show that the impact of the dispersion on the global dynamics of the metapopulation is complicated and interesting: it can affect the existence of a positive equilibrium; it can either drive the metapopulation to global extinction, or prevent the metapopulation from going to global extinction and stabilize a positive equilibrium; it can also destabilize a positive equilibrium or a periodic orbit.

scholarly journals A New Simple Epidemic Discrete-Time Model Describing the Dissemination of Information with Optimal Control Strategy

2020 ◽  
Vol 2020 ◽  
pp. 1-11 ◽  
Author(s):  
Hamza Boutayeb ◽  
Sara Bidah ◽  
Omar Zakary ◽  
Mostafa Rachik
Keyword(s):  
Optimal Control ◽  
Discrete Time ◽  
Control Strategy ◽  
Unstable State ◽  
Optimal Control Strategy ◽  
Time Model ◽  
Discrete Time Model ◽  
Before And After ◽  
The Impact ◽  
Information Amount

In this paper, we consider a new discrete-time model that describes the spread of information by sharing in some kind of online environments such as Facebook, WhatsApp, and Twitter. The impact of sharing on the information amount is investigated, which is incorporated in the considered model as a supplement compartment. We consider the possible interactions between individuals and information on the Internet, such as posts, images, and videos. The theory of control is used to show the effectiveness of our optimal control strategy in reducing the information amount and sharers and then decreases the dissemination of false information that can lead to annoying situations and unstable state in the society. Numerical simulations are performed to investigate several scenarios before and after the use of our strategy of control. Furthermore, sensitivity analysis of the information amount on parameters is simulated and discussed.

scholarly journals The Impact of Excited Neutrinos onνν¯→γγProcess

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
S. C. İnan ◽  
M. Köksal
Keyword(s):  
Standard Model ◽  
Ultrahigh Energy ◽  
The Standard Model ◽  
The Impact

We examine the effect of excited neutrinos on the annihilation of relic neutrinos with ultrahigh energy cosmic neutrinos for theνν¯→γγprocess. The contributions of the excited neutrinos to the neutrino-photon decoupling temperature are calculated. We see that photon-neutrino decoupling temperature can be significantly reduced below the obtained value of the Standard Model with the impact of excited neutrinos.

Non-homogeneous infinitely many sites discrete-time model with exact coalescent

2009 ◽  
Vol 33 (6) ◽  
pp. 713-732
Author(s):  
Adam Bobrowski ◽  
Marek Kimmel ◽  
Małgorzata Kubalińska
Keyword(s):  
Discrete Time ◽  
Time Model ◽  
Discrete Time Model
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