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Articles by A. Yahaya
Total Records ( 2 ) for A. Yahaya
  Z. Ismail , Suhartono , A. Yahaya and R. Efendi
  Problem statement: It is common in time series data with extreme change in its mean caused by an intervention which comes from external and/or internal factors. This extreme change in mean is known as regime change or structural change. Problems of external factor intervention such as the effect of the Arab oil embargo to consumption level of electricity in United States. The issue of interest here is on the impact of terrorist Bali’s bomb to tourism industry in Indonesia. Approach: A theoretical and empirical studies on the intervention model, particularly pulse function of intervention is carried out focusing on the differential statistics that can be used to determine the order of intervention model. A case study of the first Bali bomb that occurred on October 12th, 2002 is an intervention of external factor that has affected the occupancy level of five star hotels in Bali. Results: The results of this theoretical study were applied to construct a model procedure of intervention model. The empirical study showed that intervention model is used to describe and explain the quantity and the length of the first Bali bomb effect towards the occupancy level of five star hotels in Bali. It shows a decreasing trend in tourist arrival in Bali, Indonesia. Conclusion: This study was focused on the derivation of some effect shapes, i.e., temporary, gradually or permanent on the arrival of tourist into Bali. A new model building procedure with three main iterative steps for determining an intervention model was used for data with extreme change in mean. The results from this theoretical study will give an opportunity for further research related to time series model that contains regime change, caused by intervention of pulse function and/or step function.
  A. Yahaya , Noordin Yahaya , J. Ramli , Y. Boon and M.N. Abd Ghaffar
  Problem statement: Every single company needs strategies in order to survive or to become a leader in the market nowadays, therefore a study towards findings the suitable strategies for Permodalan National Berhad had been carried out. Approach: The purpose of the study was to determine the types of ASNB’s promotional strategies, to identify the level of effectiveness promotional tools used by Amanah Saham National Berhad (ASNB), to describe the correlations between ASNB’s promotional strategies with customer motivation to invest and to examine the effect of the promotional tools with the customer motivation to invest in ASNB’s products. Results: The findings from the study found that several strategies should be recommended to Amanah Saham National Berhad (ASNB). Firstly, ASNB’should increase sales promotion such as high income distribution/dividend, offer scheme ’bantuan khairat kematian’ to the investors, offer fixed and variable price as well as withdrawal or savings at any time for the investors as this can really encourage Bumiputera and non Bumiputera to invest in ASNB. Secondly, the information about PNB should be more advertise in television and newspaper since people are always see and read this two medium. The advertisement also should be more creative and attractive. Conclusion: Furthermore, PNB should hire more sales executives and hire individual agents as the strategy to boost up ASNB’s sales.
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