They're shrinking! Shrinking!

Our diocesan office recently received the Second Edition of the New Catholic Encyclopedia, whose first edition was printed c. 1967. I was surprised and disappointed to note that this edition is smaller than the first edition (which itself was a smaller encyclopedia than the Catholic Encyclopedia published in 1907-1912). In just looking up articles at random, I found a number that were in the first edition but not the second (e.g. the long article on textual criticism of the Bible [found as "Bible, V" in the first edition]).

Does anybody have any "inside info" on this new edition? Why is it smaller?