Exhibit 99.(l)

                               PURCHASE AGREEMENT

     Lord Abbett Large-Cap Growth Fund, a business trust organized under the
laws of the State of Delaware (the "Trust"), and Lord, Abbett & Co. ("LAC"), a
general partnership organized under the laws of the State of New York, agree as
follows:

     1.   OFFER AND PURCHASE.

     The Trust offers LAC and LAC purchases 10,000 shares, no par value per
share (the "Shares"), of the Trust, at a price of $10 per share. LAC
acknowledges receipt of the Shares and the Trust acknowledges receipt from LAC
of $100,000 in full payment for the Shares.

     2.   REPRESENTATION BY LAC.

     LAC represents and warrants to the Trust that the Shares are being acquired
for investment purposes and not with a view to resale or further distribution.

     3.   FILING OF CERTIFICATE OF TRUST.

     The Trust represents that a copy of its Certificate of Trust dated as of
September 29, 1999, as amended from time to time, is on file with the Secretary
of the State of Delaware.

     4.   DATES.

     This Agreement has been executed by the Trust and LAC as of December 14,
1999 and will become effective as of the date the Trust's Registration Statement
on Form N-1A becomes effective.

                                  LORD ABBETT LARGE-CAP GROWTH FUND


                                  By:   /s/ Lawrence H. Kaplan
                                        ----------------------------------
                                        Lawrence H. Kaplan
                                        Assistant Secretary


                                  LORD, ABBETT & CO.


                                  By:   /s/ Paul A. Hilstad
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                                        Paul A. Hilstad
                                        General Counsel & Partner