Ağ Dışsallıkları: Türkiye Mobil İletişim Piyasası İçin Ampirik Bir Analiz

Yıl 2020, Cilt: 15 Sayı: 57, 72 - 83, 31.01.2020

Mikail Kar

https://doi.org/10.19168/jyasar.606270

Öz

Bu çalışmada Türkiye
Mobil Telekomünikasyon Piyasası’ndaki ağ dışsallıklarının varlığı ve etkileri
analiz edilmektedir. Ampirik analizde piyasa talebini ve piyasa fiyatını
dikkate alan dört farklı model Türkiye’deki mobil operatörlere ait
2005q1-2019q1 dönemleri arasındaki panel veriler kullanılarak dinamik ortak
korelasyonlu etkiler (DCCE) tahmincisi yardımıyla tahmin edilmiştir. Elde
edilen sonuçlar talep ve fiyatların belirlenmesinde ağ dışsallıklarının etkili
olduğunu göstermektedir. Sonuçlara göre geçmiş dönemdeki ağa katılma talebinde
%1’lik bir artış mevcut dönemdeki ağa katılma talebini yaklaşık %0.3
artırırken, piyasa fiyatını yaklaşık %2 artırmaktadır. Geçmiş dönemdeki ağı
kullanma talebinde meydana gelecek %1’lik bir artış mevcut dönemdeki ağı
kullanma talebini %0.7 artırırken piyasa fiyatını yaklaşık %1.1 artırmaktadır.
Ayrıca geçmiş dönemdeki piyasa yoğunlaşmasında meydana gelecek %1’lik bir
artışın mobil iletişim talebini %0.1 ile %0.7 arasında, piyasa fiyatını
ise  %2.5 ile %3 arasında artıracağı
tespit edilmiştir.

Anahtar Kelimeler

Ağ Dışsallıkları, Mobil Telekomünikasyon Piyasası, Mobil İletişim Talebi, DCCE Tahmincisi

Network Externalities: An Empirical Analysis For The Turkish Mobile Communications Market

Öz

In this study, the existence
and effects of network externalities in Turkish Mobile Telecommunications
Market is analyzed. In empirical analysis, four different models, both taking
market demand and market price into account, were estimated using panel data
from the 2005q1-2019q1 periods of mobile operators in Turkey with the help of
dynamic common correlated effects (DCCE) estimator. The results show that
network externalities are effective in determining demand and prices. According
to the results, a 1% increase in the demand for joining the network in the past
period increases the demand for joining the network in the current period by
about 0.3%, while increases the market price by about 2%. A 1% increase in the
demand to use the network in the past period increases the demand to use the
network in the current period by 0.7%, increases the market price by about
1.1%. Furthermore, it was determined that a 1% increase in market concentration
in the past period would increase the demand for mobile communication between 0.1%
and 0.7% and increase the market price between 2.5% and 3%.

Anahtar Kelimeler

Network Externalities, Mobile Telecommunications Market, Demand For Mobile Communications, DCCE Estimator

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