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Essays on supplier responsiveness and buyer firm value - Nyenrode ...

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3.2.3 Normality of Data<br />

Table 3.3 presents the results for the normality of the distributi<strong>on</strong> of the variables in<br />

our model based <strong>on</strong> the Dutch data. As recommended by Baumgartner <strong>and</strong> Homburg<br />

(1996), we first c<strong>on</strong>ducted tests of normality <strong>on</strong> our data. We found that two variables<br />

in our data SIQ <strong>and</strong> RP did exhibit skewness. The criteria we used to assess for<br />

skewness <strong>and</strong> kurtosis was whether the skewness or kurtosis ratio to its respective<br />

st<strong>and</strong>ard error was less than 2 (Bachman, 2004, p. 74). We transformed SIQ <strong>and</strong> RP<br />

variables by taking their square root computed by SPSS 17, under the compute new<br />

variable tab. The result was that the new computed variables SIQ <strong>and</strong> RP were<br />

normally distributed.<br />

Table 3.3<br />

Kurtosis <strong>and</strong> Skewness<br />

N Mean Std. Dev Skewness Kurtosis<br />

Stat Stat Stat Stat Std.<br />

Error<br />

Ratio<br />

1**<br />

Stat<br />

Std.<br />

Error<br />

Ratio<br />

2**<br />

SIQ 92 2.27 0.77 0.51 0.25 2.04 0.92 0.50 1.86<br />

CustNPD 92 2.35 0.84 0.38 0.25 1.52 0.20 0.50 0.41<br />

CF 92 2.49 0.76 -0.04 0.25 -0.15 -0.31 0.50 -0.62<br />

RP 92 2.11 0.91 0.77 0.25 3.08 0.85 0.50 1.71<br />

Fairness 92 2.30 0.77 0.46 0.25 1.84 0.87 0.50 1.75<br />

SALES 92 2.30 0.82 0.35 0.25 1.39 0.35 0.50 0.69<br />

IM 92 3.53 0.88 -0.20 0.25 -0.79 0.28 0.50 0.56<br />

CCC 92 3.51 0.83 -0.15 0.25 -0.61 0.67 0.50 1.35<br />

AssBr<strong>and</strong> 92 2.27 0.80 0.26 0.25 1.02 0.40 0.50 0.80<br />

BV 92 2.33 0.70 0.01 0.25 0.05 -0.22 0.50 -0.44<br />

SIQ (***) 92 1.48 0.26 -0.08 0.25 -0.33 0.26 0.50 0.51<br />

RP (***) 92 1.41 0.39 0.22 0.25 0.88 -0.39 0.48 -0.62<br />

***SIQ <strong>and</strong> RP. SIQ <strong>and</strong> RP are transformed by taking the square root of SIQ <strong>and</strong> RP in order to<br />

correct for the skewness of both variables.<br />

**The Ratio 1 column represents the skewness statistic to its st<strong>and</strong>ard error ratio. The ratio 2 column<br />

represents the kurtosis statistic to its st<strong>and</strong>ard error ratio. Each ratio <strong>value</strong> should be less than 2 in<br />

absolute <strong>value</strong>.<br />

3.2.4 SEM<br />

We estimated two SEM models in our analysis for comparis<strong>on</strong> with the model in<br />

chapter 2. The reas<strong>on</strong> we estimated two models is because of the rule that a 10<br />

resp<strong>on</strong>dents are required per measured item in a SEM model (Hair et al., 2006, p.<br />

604). Our sample size of 92 resp<strong>on</strong>dents <strong>and</strong> 10 observed variables did not let us meet<br />

that ratio. Our sec<strong>on</strong>d model in this chapter labeled Model 2 c<strong>on</strong>sists of the variables<br />

<strong>supplier</strong> resp<strong>on</strong>siveness, IdRR, <strong>supplier</strong> br<strong>and</strong> <strong>value</strong>, <strong>and</strong> <strong>buyer</strong> <strong>firm</strong> <strong>value</strong>. Our third<br />

model in this chapter labeled Model 3 c<strong>on</strong>sists of the variables <strong>supplier</strong><br />

resp<strong>on</strong>siveness, <strong>buyer</strong> satisfacti<strong>on</strong>, <strong>and</strong> <strong>buyer</strong> <strong>firm</strong> <strong>value</strong>. For a large model with 10<br />

observed variables we normally should have about 150-200 resp<strong>on</strong>dents <strong>and</strong><br />

recommended of 10 resp<strong>on</strong>dents per item (Hair et al, 2006, p. 604). The two models<br />

(2 <strong>and</strong> 3) fulfill the criteria of 10 resp<strong>on</strong>dents per item. In the rest of this secti<strong>on</strong> we<br />

86

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