Measurement: As the measure for HRM practices, the measure that Gürbüz and Mert (in print) have prepared based on the measures developed by Becker and Huselid (1998); Wright et al. (2005) and adapted to Turkish has been chosen. HR practices have been evaluated for choice, training, performance evaluation, promotion, performance-based rewards, information sharing and job security variables. All the items about HR practices have been graded based on a five-point scale with (1) I completely disagree and (5) I completely agree. HR practices have been evaluated thus: Choice has been evaluated with a four items based on the five-part Likert scale, graded between (1) I completely disagree and (5) I completely agree. Cronbach alpha coefficient for the choice index was 0.88. The training variable has been evaluated with a four items based on the five-part Likert scale, graded between (1) I completely disagree and (5) I completely agree. The measure focuses on the training opportunities offered the employees by the organization and the level of use that the training gets in recruitments and the career advancements of existing employees. An example item is "this job offers the employees comprehensive training programs". Cronbach alpha coefficient for the training index was 0.78. Performance evaluation has been evaluated with a four items based on the five-part Likert scale, graded between (1) I completely disagree and (5) I completely agree. One of the items was "the evaluation system is focused on growth and development". The purpose of the evaluation system is clear for every employee Cronbach alpha coefficient for the performance evaluation index was 0.85. Promotion has been evaluated using the five-part Likert scale without changing the interval used for previous practices. The first two items has asked the employees about the existence of career opportunities within the organization and advancement opportunities within the organization. The third item measured the existence of career development plans for the employees, and the fourth and last item covered questions about the employees' choices in case any open position comes up. Cronbach alpha coefficient for the promotion index was 0.82. Performance-based rewards have been evaluated with a four items based on the five-part Likert scale, graded between (1) I completely disagree and (5) I completely agree. The first two items examined whether the company uses performance-based rewards and the comparability of the reward system with market conditions. The third item is about whether the pricing is done in line with skills and capabilities and the last item measures the level of correlation of the additional payments with the employees' performances. Cronbach alpha coefficient for the performance-based rewards index was 0.83. Information sharing have been evaluated with a four items based on the five-part Likert scale, graded between (1) I completely disagree and (5) I completely agree. Some of the items are: "employees are free to take any decision they want to in this job" "Superiors keep the communcation channels with the employees open at all times." Cronbach alpha coefficient for the information sharing index was 0.88. The job security index covering four items has been evaluated with the same rating system used in other HR practices in this study, based on the five-part Likert scale. Some of the items are: "individuals working in this job may hope to stay in the organization for as long as they wish", and "in case the bank experiences financial troubles, the employees will be the last ones to lose their jobs" Cronbach alpha coefficient for the job security ndex was 0.80. For the organizational commitment factor the (Timothy et al. 2001) measure has been used. There were sixteen items based on the five-part Likert scale and they were graded between (1) I completely disagree and (5) I completely agree. Some of the exemplary items: "I have a high level of feeling of belonging to the organization I work for" "I'm proud to work in this organization". Cronbach alpha coefficient for this index was 0.85.