The secondary data is the second choice as the model of information collection. There are lots of online interviews of Apple managers when Apple Inc. decides to make a decision on iPhone’s publication or adjustments in strategy. Please contact us at http://www.aceessays.com/contact-us if you are interested in essay writing services.
The public information helps the study get the useful resources to analyse recent situation. Apple Inc. publishes the annual report in Apple store and it is convenient to collect and analyse data from it. However，Web-based surveys can achieve large samples cheaply and it is easy to customise but it has low respondent rates and little control during the research.