Browsing by Person "Staus, Alexander"

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An ordinal regression model using dealer satisfaction data
(2007) Staus, Alexander
This article analyses dealer satisfaction data in the agricultural technology market in Germany. The dealers could rate their suppliers in the ?overall satisfaction? and in 38 questions which can be summarized in 8 dimensions. An ordinal regression model which is also known as the proportional odds model is used to analyse the ordinal scaled rating of the dealers. The ordinal regression model is a well examined method in econometric theory, but many authors prefer using a linear regression model due to better interpretation, even the assumptions of a linear regression do not fit the data. Since the estimated coefficients of an ordinal regression model can not be properly interpreted we show other methods for a better insight of the relationship of the dealer satisfaction and the influencing variables. These methods are easy to use and it is recommended to list some of them in empirical papers.
Standard and Shuffled Halton sequences in a Mixed Logit Model
(2008) Staus, Alexander
Modeling consumer choice in different areas has lead to an increase use of discrete choice models. Probit or Multinomial Logit Models are often the base of further empirical research of consumer choice. In some of these models the equations to solve have no closed-form expression. They include multi-dimensional integrals which can not be solved analytically. Simulation methods have been developed to approximate a solution for these integrals. This paper describes the Standard Halton sequence and a modification of it, the Shuffled Halton sequence. Both are simulation methods which can reduce computational effort compared to a random sequence. We compare the simulation methods in their coverage of the multi-dimensional area and in their estimation results using data of consumer choice on grocery store formats.
Die Zufriedenheit der Landmaschinenhändler mit den Herstellern
(2010) Becker, Tilman; Staus, Alexander
This paper analyses satisfaction of agricultural machinery dealers with manufacturers of such. While several analyses have focused on carmakers for quite some time, this paper analyses the field of agricultural machinery for the first time. Between 2006 and 2008, dealers of agricultural machinery were queried about their overall satisfaction regarding distribution and marketing measures taken by the respective manufacturers. We categorised distribution and marketing measures into 38 subquestions, which we can summarise in 8 independent dimensions. We analysed the following tractor brands: Case IH, Claas, Deutz-Fahr, Fendt, John Deere, Massey Ferguson, and New Holland. In terms of overall satisfaction, Fendt achieved the best results followed by CLAAS, Deutz-Fahr, and John Deere. Massey Ferguson, New Holland, and Case IH obtained poor ratings. Between 2006 and 2008, Case IH and New Holland saw the greatest increase in overall satisfaction, thus moving up to the mid-range. Fendt and Claas shared the two top positions in all dimensions. Fendt shows optimal results in three areas: product programme, design of purchasing conditions, and relationship with manufacturer. Regarding the five remaining dimensions, Claas is spearheading in terms of satisfaction. We observe a similiar result for 2006. Fendt dominates with its product programme and shares the top position with Claas regarding relationship with manufacturers. Nonetheless, Fendt leads the way for overall satisfaction significantly. Considering the results of the remaining brands, we observe that good and poor ratings of the product programme and the design of purchasing conditions correlate with good and poor ratings of overall satisfaction. Of all dimensions, the correlation between overall satisfaction and product programme is highest with 0.73. The regression results confirm the relevance of the product programme for overall satisfaction. Three of the four items are significant: Product innovation, product quality and performance, and pricing. While the regression cannot confirm the relevance of designing purchasing conditions, two items within the dimension marketing and sales promotion have a significant impact. For tractors, there is a correlation between overall satisfaction and market share or changes in market share. Market shares and overall satisfaction increased for Fendt, Case IH and Claas between 2006 and 2008, while both figures fell for John Deere. The shares of Deutz-Fahr and Massey Ferguson remain relatively constant, while the overall satisfaction of dealers is slightly declining. New Holland faces fluctuations up and down between the years. Overall satisfaction grew. The development in overall satisfaction can serve as an indicator for future market share developments.