Long-Run Equilibrium in the Market of Mobile Services in the USA

被引:1
|
作者
Badev, Anton [1 ]
Kabaivanov, Stanimir [2 ]
Kopanov, Petar [3 ]
Zhelinski, Vasil [3 ]
Zlatanov, Boyan [3 ]
机构
[1] Fed Reserve Board Governors, Div Supervis & Regulat, Washington, DC 20551 USA
[2] Univ Plovdiv Paisii Hilendarski, Fac Econ & Social Sci, Dept Finance & Accounting, Plovdiv 4000, Bulgaria
[3] Univ Plovdiv Paisii Hilendarski, Fac Math & Informat, Dept Math Anal, Plovdiv 4000, Bulgaria
关键词
duopoly equilibrium; response functions; mobile market; DYNAMIC OLIGOPOLY; POINTS;
D O I
10.3390/math12050724
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
We develop an empirical model of the market for mobile services in the USA based on providers' response functions. Guided by a duopoly model, we obtain our empirical response functions from an approximation of quarterly response data on smartphone subscriptions by sigmoid functions of time. The robustness analysis suggests that our model fits the data well and outperforms the regression model. Further, we demonstrate that our empirical response functions satisfy the conditions for semi-cyclic contractions which guarantee the existence, uniqueness and stability of long-run equilibrium.
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页数:21
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