1. Cost Per Action or CPA(as it is often initialized to) is a phrase often used in online advertising and online marketing circles. CPA is considered the optimal form of buying online advertising from a direct response advertiser's point of view. An advertiser only pays for the ad when an action has occurred. An action can be a product being purchased, a form being filled, etc. (The desired action to be performed is determined by the advertiser.) Google has incorporated this model into their Google AdSense [1] offering while eBay has recently announced a similar pricing called AdContext.
The CPA can be determined by different factors, depending where the online advertising inventory is being purchased.
[edit] CPA as "Cost Per Acquisition" CPA is sometimes referred to as "Cost Per Acquisition", which has to do with the fact that most CPA offers by advertisers are about acquiring something (mostly new customers, prospects or leads). Using the term "Cost Per Acquisition" instead of "Cost Per Action" is not incorrect. It is actually more specific. "Cost Per Acquisition" is included in "Cost Per Action", but not all "Cost Per Action" offers can be referred to as "Cost Per Acquisition".
[edit] Effective cost per action A related term, eCPA or effective Cost Per Action, is used to measure the effectiveness of advertising inventory purchased (by the advertiser) via a CPC, CPM, or CPT basis.
eCPA is used to measure the effectiveness of advertising inventory purchased (by the advertiser) via a CPC, CPM, or CPT basis. In other words, the eCPA tells the advertiser what they would have paid if they purchased the advertising inventory on a CPA basis (instead of a CPC, CPM, or CPT basis).
[edit] See also Affiliate marketingCTR - Click-through rateCPC - Cost Per ClickCost Per ConversionCPI - Cost Per ImpressionCPM - Cost Per MilleCPT - Cost Per ThousandCPT - Cost Per TimeCPA - Cost Per ActioneCPA - Effective Cost Per ActioneCPM - Effective Cost Per MilleInternet marketingPPC - Pay Per click (Search engines term for CPC)Revenue Share - Cost derived from advertiser incomeVPA - Cost Per Action variation that transparently balances incentives between vendors and consumersCompensation methods網址:
http://en.wikipedia.org/wiki/Cost_Per_Action
2.
Certified Public Accountant (CPA) is the statutory title of qualified accountants in the United States who have passed the Uniform Certified Public Accountant Examination and have met additional state education and experience requirements for certification as a CPA. In most U.S. states, only CPAs who are licensed are able to provide to the public attestation (including auditing) opinions on financial statements. The exceptions to this rule are Arizona, Kansas, North Carolina and Wyoming, where although the "CPA" designation is restricted, the practice of auditing is not.
Many states have a lower tier of accountant qualification (below that of CPA), usually entitled "Public Accountant" (with designatory letters "PA"). However the majority of states have closed the designation "Public Accountant" to new entrants, with only about 10 states continuing to offer the designation. Many PAs belong to the National Society of (Public) Accountants.
Many states prohibit the use of the designations "Certified Public Accountant" or "Public Accountant" (or the abbreviations "CPA" or "PA") by a person who is not certified as a CPA or PA in that state.[1] As a result, in many circumstances, an out-of-state CPA is restricted from using the CPA designation or designatory letters until a license or certificate from that state is obtained.
網址:
http://en.wikipedia.org/wiki/CPA