There are several reasons why online publication of research journals can be more cost-effective than printing:

1. Printing costs: Printing physical copies of research journals can be expensive, particularly if the journal is being distributed internationally. Online publication can significantly reduce or eliminate these costs.

2. Distribution costs: Physical copies of research journals need to be shipped to subscribers, which can be costly. Online publication eliminates the need for physical distribution, which can save money.

3. Storage costs: Physical copies of research journals take up space and may require storage facilities, which can incur additional costs. Online publication eliminates the need for physical storage, which can save money.

4. Accessibility: Online publication makes research journals more widely accessible, as they can be accessed from any device with an internet connection. This can increase the reach and impact of the research, which can be beneficial for the journal and its authors.

5. Environmental impact: Printing physical copies of research journals can have a negative impact on the environment due to the use of paper and other resources. Online publication can be more environmentally friendly, as it does not require the use of physical resources.

Overall, an online publication of research journals can be more cost-effective than printing due to reduced costs for printing, distribution, storage, and environmental impact. It can also increase the accessibility and reach of the research, which can be beneficial for the journal and its authors.