u should be fine if you just preface what ur stance of the effectiveness is in your introduction (e.g.while both domestic and international processes and institituion are effective to an extent (something or other) in dealing with international crime, domestic measures are more effective in terms of enforceability, etc) and then just in each of your body paragraphs discuss the successfulness and limitations of each and then make another overall statement on whether domestic or international is better in ur conclusion