1. Publisher: Different publishers may have different pricing strategies. Some well-known publishing houses may charge higher fees because they have more resources and a wider readership.
2. Journal impact factor: The impact factor of a journal is an important indicator to measure its influence. Generally speaking, the higher the impact factor, the higher the purchase price of its articles.
3. Article type: Different types of articles may have different pricing. For example, review articles are usually more expensive than original research articles because they require more research and writing time.
4. article length: the length of the article will also affect its price. Generally speaking, longer articles will charge higher fees.
5. Order quantity: If you need to order more than one article, the publisher may offer a certain discount.
6. Language: If the article is written in non-English, you may have to pay extra translation fees.
7. Open Access (OA) option: Many publishers now offer open access options, but this usually requires an extra fee. Open access articles can be read and downloaded by anyone in the world for free, which is very attractive to authors who want to expand their research influence.
8. Subscription services: Some publishers also provide subscription services, such as typesetting and proofreading, which may increase the price of articles.
Generally speaking, the purchase price of SCI articles is determined by many factors, including publishers, journal impact factors, article types, length, order quantity, language, open access options and subscription services. When purchasing, you should choose appropriate periodicals and articles according to your own needs and budget.