Düşük Maliyetli Taşıyıcılarda Verimliliğin Test Edilmesi: Sağlamlaştırılmış Veri Zarflama Analizi Uygulaması

Bu araştırma, verimlilikleri karşılaştırarak düşük maliyetli taşıyıcılara odaklanmaktadır. Bu makalede 2003-2013 yılları arasında toplam dokuz adet düşük maliyetli taşıyıcı bir araya getirilmiştir. Verimliliği ölçmek için girdi ve çıktıları içeren veriler tasarlandıktan sonra, her yıl sağlamlaştırılmış veri zarflama analizi yapılmaktadır. Etkinlikler zaman içinde gösterilen aşamalar listelenerek hesaplanır. Verimlilik puanları, veri zarflama analizinin 1000 kez yinelenen önyüklenmiş sonuçlarıyla tahmin edildiği şekilde yıllara göre değişmektedir. İlk olarak, her şeyden önce zaman içindeki değişikliklerin sonuçları hesaplanır. İkinci olarak, varyasyon katsayıları (CV), k-aracı kümeleme algoritması için ayrı ayrı hesaplanır. Bu hesaplanan taşıyıcılar alt gruplara ayrılır. Bu alt gruplar; verimli ve tutarlı, hafif verimli ve hafif tutarlı, ne verimli ne de tutarlı olarak sınıflandırılır. Sırasıyla; giriş, literatür taraması, metodoloji ve verilerle değişken kullanımlarının tanımlanmasından sonra, analiz üzerinde gösterilen değişkenlere göre sonuçlar varsayımlara bağlı olunduğunu göstermektedir.

Testing Efficiency On Low Cost Carriers: An Application Of Robust Data Envelopment Analysis

This research focuses on low cost carriers by comparing theirefficiencies. In total, nine low cost carriers are gathered togetherfor the years between 2003-2013. After designing the datawhich includes inputs and outputs to measure their efficiency,robustified data envelopment analysis is conducted year byyear. Their efficiencies are calculated by listing as a path overtime. Their efficiency scores are varied according to years asthey are estimated with 1000 time iterated bootstrappedresults of data envelopment analysis. First of all, results ofvariances over time are calculated. Secondly, their coefficient ofvariations (CV) are calculated too for k-means clusteringalgorithm. These calculated carriers are separated subgroups as:efficient and consistent, slightly efficient and slighty consistent,neither efficient nor consistent. After the parts of introduction,literature review, description of variable utilizations withmethodology and data, the results according to the variablesshow that dependson assumptions returns to scale.

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