杯葛行為的特質，在於其具有相當倫理的非難性，所以杯葛發起人一但發動杯葛行為，很容易符合公平交易法的規範，產生不公平競爭與限制競爭之可能。以產業經濟「競爭內涵」的層次加以分析，更容易清楚看出杯葛行為對「市場競爭」或「產業競爭」的傷害。 除法律上可將杯葛行為區分為：斷絕供應、斷絕購買、其他交易行為的杯葛行為外，按杯葛發起人、杯葛參與人、杯葛受害人所處市場情況，可進一步的將杯葛行為區分為水平杯葛與垂直杯葛的8種型態。 以經濟理論模型分析，不管是在競爭市場結構下，或是優勢廠商市場結構下，均可證明杯葛行為將帶來消費者剩餘的減少，以及整體社會福利水準的降低，支持杯葛行為應傾向以「當然違法」的模式處理其可責性。

Unquestionably, boycott behavior represents ethically wrong behavior; thus, whenever boycott behavior is initiated, it is very likely that unfair competition and competition restraints follow, thereby violating the Fair Trade Act. This study notes that, in an analysis, when the concept of “nature of competition” in industrial economics is adopted, it is easier to identify any damage to “market competition” or “industry competition” caused by boycott behavior. As per law, boycott behavior can be classified into supply severance, purchase severance and boycotts of other transaction behavior. In addition, depending on the state of the market that the initiators, participants and victims of boycotts encounter, boycott behavior can be further categorized into eight types under horizontal and vertical boycotts. Using an economic model for analysis, it is found that boycott behavior contributes to a decline in consumer surplus no matter if it is in a competitive market structure or in a dominant firm market structure. Also, such behavior results in a leveling down of overall social welfare. Finally, this study full supports the position that the competition authority should adopt the “per se illegal” principle to handle boycott behavior.